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Framing fashion with Dixie Dixon

Digital Photography Review - vor 5 Stunden 18 Minuten
At the age of 20, most people are just beginning to figure out what careers they want to pursue. Dixie Dixon got an early start in photography, so by 20 she had years of experience under her belt and a clear direction in mind – fashion photography. As New York prepares to host Fashion Week 2016 in a few days, we're re-visiting Dixon's PIX 2015 talk. An engaging speaker, she discusses getting her start in fashion photography and an unlikely first 'break' in the business photographing swimsuit models for a reality TV show.
Kategorien: Fotografie

Don’t have a neutral density filter on hand? Then use your hand!

Imaging Resource - vor 5 Stunden 43 Minuten
If you don't own a graduated neutral density (ND) filter or you just happen to be without one in the field, Paul Rutherford has a great tip for you, use your hand! Rutherford doesn't own a hard-edged graduated ND filter as he's often relied on post-processing to achieve a similar effect, but he found that simply using his hand to cover up the brightest areas of the image (the sky in this case) during a long exposure allowed him to get the desired results out in the field. At first, he leaves his hand in front of his lens for roughly one-third of the...
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Kategorien: Fotografie

Heavy hitter: Sony FE 24-70mm F2.8 GM first shots

Digital Photography Review - vor 18 Stunden 41 Minuten
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Sony has made some strong claims about its new G Master lens series. Unveiled earlier this week, the FE 24-70mm F2.8 GM is one of three in the lineup to make its debut, giving Sony's full-frame mirrorless customers a fast, constant standard zoom for the first time. We had a few moments to shoot with the lens at Sony's press event in New York, and while we only provide a small sampling of shots at this time, we will be updating this gallery as soon as we can. 

Our initial impressions are extremely positive: sharpness appears to rival prime levels wide open, and there's very little axial chromatic aberration to speak of. Sony's claims may not be exaggerated at all.

We need to make a note about lens corrections: it seems that the camera we were handed had vignetting and chromatic aberration corrections turned on. The way this feature works is that these corrections are applied even in Raw mode (technically, vignetting correction is applied prior to writing the Raw file, while chromatic aberration correction information is embedded in the Raw and irreversibly applied by ACR).

The good news is that we've looked at Raw conversions from third-party converters that ignore the CA correction profile, and CA from this lens appears to be very minimal. Watch this space for more sample images, hopefully very soon.

Kategorien: Fotografie

Firmware Friday: Olympus tweaks E-M1, E-M5 II; Leica T (Typ 701) and Arri Alexa Mini get new features

Imaging Resource - Fr, 05/02/2016 - 21:38
    If you're shooting with Olympus' E-M1 or E-M5 Mark II compact system cameras, the Leica T (Typ 701), or Arri's Alexa Mini, we have news for you today. The trio of companies have released firmware updates for these products, and we've got all the details in this week's Firmware Friday roundup! We'll start off this week with Arri and Leica, whose updates add a whole raft of new features to their cameras. The Leica T (Typ 701) firmware version 1.5 release makes a significant step forwards in performance, with the company...
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Kategorien: Fotografie

Samyang adds 14mm and 35mm lenses to Xeen cinema system

Digital Photography Review - Fr, 05/02/2016 - 21:19
The 14mm T3.1 Samyang Xeen lens

Korean lens manufacturer Samyang has added two new wide angle lenses to its Xeen series of full-frame video lenses. The new focal lengths are 14mm and 35mm, and while the 35mm conforms to the family-standard maximum aperture of T1.5 the 14mm opens only to T3.1. The Xeen system now contains a total of five lenses as these two join the existing 24mm, 50mm and 85mm.

All the lenses are manual focus only, and feature focus and aperture gear rings in identical positions so that they can be switched quickly in and out of the same rig. Filter rings also match, and users have a choice of metric or imperial focus scales. The lenses come with interchangeable mounts, and adapters are available for Canon EF, Nikon F, Sony E, PL and Micro Four Thirds bodies.

The 35mm T1.5 Samyang Xeen lens

Samyang is proud of the way its lenses render out-of-focus highlights, and the new 35mm complements the existing lenses with its 11-blade diaphragm. The wider lens uses a 9-bladed iris.

The lenses should be on sale by March at a cost of £1599.

For more information visit the Samyang Xeen website

Press Release:

Two more XEEN Lenses announced by Samyang to complete a Perfect Five-Lens-Set

SEOUL, February 5th, 2016 –Global optics brand, Samyang Optics, has announced the release of 2 new lenses: XEEN 14mm T3.1 and 35mm T1.5. These two lenses, along with the existing 24mm T1.5, 50mm T1.5 and 85mm T1.5 lenses, create a perfect balanced five-lens-set for filming video and cinema with the outstanding image quality from resolving power for 4K+ production.

XEEN is a specialized brand in professional video-cine lens launched by Samyang Optics in 2015. The XEEN lenses are designed with Samyang Optics' know-how and have outstanding optical performance for 4K+ with the X-Coating Technology, ensuring maximum image quality to create a cinematic look.

The 24mm x 36mm negative size allows XEEN to not only work with full frame cameras, but also with Super 35, APS-C and APS-H cameras. The lenses are available in five different mounts - PL, EF, F, E, and MFT and two different focus scales - metric and imperial units. Also, the aluminum metal housing is known for its reliability in various shooting conditions.

Most of the XEEN lenses come in a bright T1.5 aperture. The lenses deliver high quality footage with clear contrast and impressive colours, even under less-than-optimal lighting conditions. The large aperture also creates a pleasing bokeh effect for a cinematic look.

“Thanks to the rise of multi-channel networks, the demands for video creation is internationally surging and the expectation of video quality is also increasing,” stated a XEEN official. He continued, “to satisfy the international needs, we have completed the first five lenses which deliver a high-quality cinematic image.” As an answer to the future product plan, he carefully disclosed that two more XEEN lenses will be announced in the second half of the year.

Created to deliver infinite possibilities, XEEN14mm and 35mm lenses will be globally available in early March. The recommended retail price of each lens is £1599.00 inc VAT.

More detailed product information is available on the official website (http://www.xeenglobal.com) and Facebook (http://www.facebook.com/xeenglobal) or Samyang Lens Global Facebook (http://www.facebook.com/samyanglensglobal).

Kategorien: Fotografie

GoPro to discontinue three cameras and exit entry-level market

Digital Photography Review - Fr, 05/02/2016 - 20:41

This week, GoPro announced it will discontinue three of its six available action cameras and abandon the entry-level market. This follows the company’s preliminary fourth quarter results revealed last month. GoPro had stated at the time that poor holiday sales would likely result in low quarterly revenue, and that it would layoff 7% of its workforce as a result.

In a conference call this week, GoPro’s founder and CEO Nick Woodman said the company’s recent misfortunes aren’t due to increased competition. 'Growth slowed in the second half of the year,' said Woodman, 'and we recognize the need to develop software solutions that make it easier for our customers to offload, access and edit their GoPro content.'

GoPro is banking on the improved software reversing its sales numbers, but it isn’t clear what other plans may be in place. Woodman said the company will be 'delivering this new experience in 2016, period.' In the meantime, though, GoPro anticipates its first quarter sales will be below analysts' $300 million expectation, falling between $160 and $180 million.

GoPro will stop selling its HERO+ LCD, HERO+ and HERO entry-level cameras in April, making the $200 HERO4 Session its least expensive model.

Via: Financial Times

Kategorien: Fotografie

In need of something big from Hero5 and Karma drone, GoPro trims current product lineup

Imaging Resource - Fr, 05/02/2016 - 20:08
With GoPro's recent struggles leading them to reduce their workforce by 7%, GoPro has decided to also trim down its product lineup. Starting in April, GoPro's current lineup of six cameras (Hero4 Black, Hero4 Silver, Hero4 Session, Hero+ LCD, Hero+, and Hero) will be reduced to three cameras, with the latter three in the list above being discontinued. Discontinuing products is not unusual, especially when releasing new ones, but GoPro's upcoming Hero5 camera is nowhere to be found as of yet. Originally scheduled to be released last fall, as GoPro typically...
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Kategorien: Fotografie

Delayed: Nikon D500 launch postponed until late April amid high demand

Imaging Resource - Fr, 05/02/2016 - 18:17
Nikon Japan has announced that the Nikon D500, which was originally scheduled to ship in mid-March, has now been delayed until late April. Both the body-only D500 configuration and Nikon 16-80mm VR lens kit version have been delayed, along with the Nikon WT-7 wireless transmitter, MB-D17 multi-power battery pack, CF-DC8 semi-soft case, and other small accessories. Nikon's reasoning for the delay (as translated by Google Translate), is that due to high demand Nikon is unable to have enough cameras available for sale, so the release date is being delayed....
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Kategorien: Fotografie

Leica T firmware version 1.5 update adds Wi-Fi Direct feature

Digital Photography Review - Do, 04/02/2016 - 20:23

Leica has released firmware version 1.5 for the Leica T, adding Wi-Fi Direct functionality for transferring images wirelessly. After updating, Leica T owners can set up a mobile hotspot through which images are shuttled between the camera and an iOS mobile device running the Leica T app. In addition, firmware 1.5 speeds up the camera's wireless reconnection with known networks and improves reconnection reliability.

The Leica T for iOS app is available from iTunes. The new firmware version 1.5 update is available through the Leica T website.

Via: Leica Rumors

Kategorien: Fotografie

'We want to make lenses that can be used forever': Sony engineer discusses G Master lenses

Digital Photography Review - Do, 04/02/2016 - 20:05

'We want to make lenses that can be used forever,' says a senior engineer behind Sony's new G master lenses. At the launch of the ‘G Master’ range of high end lenses, we spoke to Motoyuki Ohtake, Distinguished Engineer in Sony’s Lens Design Department about the process and the philosophy behind the latest lenses.

The development process series involved re-thinking several parts of the design and manufacturing process, he says.

Motoyuji Ohtake, Distinguished Engineer, Opto Design Department, Core Technology Division, Digital Imaging Business Group at Sony.

To understand how the lenses came about, he explained the usual process of lens development. ‘Sometimes we propose a new lens but often it comes from the product planning department [the marketing department that assesses potential requirements and demands]. We then make a series of rough designs, some are big, with high optical performance, others are more compact but maybe not so optically strong. We discuss which design to proceed with, based on what we think is the optimal balance or cost, performance and size to make the perfect product.’

After deciding which of the initial designs to pursue, there’s a great deal of collaboration between teams, he explains: ‘we work with the mechanical team, the lens motor team, the lens control team, the lens element team and maybe the equipment team who will have to prepare the manufacturing process.’ Each of these team feeds its expertise into the design. ‘Maybe the optical team proposes a new lens design and the motor team tells us which motor is best. Or warn us if the focus will be too slow. They feed back about the mechanical aspects,’ he says.

The G Master series required many of these teams to re-think their parts of the process, from design to manufacture.

Re-thinking basic assumptions

‘For the G Master lenses we decided we would assess the spatial frequency at 50 lines per mm,’ says Ohtake: ‘Usually lens makers, including ourselves, evaluate lenses at 10 and 30 lpmm (or 10, 20 and 40 for Carl Zeiss-branded optics).’

‘At the start of the process we all agreed we should change the spacial frequency [to a more challenging target],’ he says: ’but which is best to get good performance? We could design for 100 lpmm but the lens would become very bulky and long - which might not be a very practical lens. A balance of the size and the optical performance was very important.’

The target of 50 lpmm wasn’t dictated by the company’s 40MP camera or 4K video, he says. ’All our FE lenses were designed for at least 40MP. Because we have an image sensor team within Sony, we get to see the sensor roadmap, so we’ve been designing for this all along with FE. With the G Master we’d like to make lenses that can be used forever.’

A focus on bokeh

But it’s not just the more stringent frequency assessment that was developed for the G Master lenses, Ohtake explains: ‘We had to discuss what good bokeh means. We have some designers from Minolta who understand that the spirit of the ‘G’ lenses was good bokeh in the background but we had no way to evaluate that.

‘We looked at what is considered good bokeh and how it affects not just the background rendering but also the transition from perfectly sharp to out-of-focus regions. We developed a way to evaluate bokeh and were able to make a simulation. This meant we didn’t have to build a lens to see how it performed, we could now computer model it before taking a design too far.’

This is a significant change, Sony says, as it means bokeh can be one of the primary design considerations, rather than being something that can only be adjusted later in the process, once the main aspects of the design have been settled upon.

Another piece of the puzzle - shape and smoothness

This analysis of the factors that affect bokeh showed that both the precision of the lens molding and the smoothness of the lens surface could have an effect.

‘Traditionally it was very hard to achieve both: current technology gives a roughness on the scale of 20-30nm on the aspheric surface. Improving this usually involved polishing, which can then lead to the lens element being slightly unevenly shaped.’

‘We developed a new way of making the lens element and a new molding process, including a new machine. Now we can get roughness down to around 10nm and get a more accurate shape to the aspherical surface.’

AF technologies Ohtake wouldn't budge when we asked which his favorite lens was, but immediately reached for the 85mm F1.4 when we took this group shot.

The first three G Master lenses use three different AF motor technologies between them - emphasizing Ohtake’s point that different technologies work better in different contexts.

The 24-70mm F2.8 uses a Direct Drive SSM system (piezoelectric element). This is very fast, very quiet and very precise. We used a linear motor for the 24-70mm F4 but this lens has a heavier focus element, so direct drive was a better choice.

The focus element in the 85mm F1.4 was even heavier, however. ‘For the 85mm we use a ring type focus motor. This is very good for heavy lens elements and our lens software team developed a good algorithm so that it works well with contrast-detection autofocus' (a traditional weakness for ring-type designs).

Finally, the 70-200mm uses a combination of a linear actuator and a ring-type focus motor. ‘The focus group had become too heavy so we separated the two focusing lenses. One is very heavy, so we used a ring type motor for that one, then used a linear motor for the other. The ring type is used to quickly achieve approximate focus and the linear motor is used for the high precision aspect.’

Still correct to optically correct

Discussing the idea that bokeh and sharpness have previously been in conflict, we asked Ohtake about other trade-offs. We’ve been told that the ability to correct lateral chromatic aberration in software makes lens design easier, since you don’t have to correct it optically, which can quickly complicate the lens design and detract from other parameters.

Not for G Master lenses, he explains. ‘Light doesn’t separate nicely into red, green and blue' (the color channels that most cameras capture, and which can be adjusted, relative to one another, to correct lateral CA). It’s a continuum with each wavelength being displaced slightly differently. ‘To get the really high contrast we wanted in G Master, we had to suppress it in the lens.’

The future of APS-C

We also asked Ohtake about Sony's APS-C lenses for E-mount. His team likes designing APS-C lenses, he says: ‘The focus elements are light, so it’s easier to design. We have all these focus motor technologies in-house and we’d like to try them in APS-C lenses if that’s what the Product Planning team says is required.’

Kategorien: Fotografie

Megapixels are not everything, but they do matter for achieving critical sharpness in your prints

Imaging Resource - Do, 04/02/2016 - 19:53
Professional photographer Tony Northrup asks in a new video, "Megapixels, should you care?" The answer is "yes." But why? In his video, Tony goes over megapixels in great detail and busts a few myths along the way. Tony firsts discusses the 300 DPI rule. According to Tony, this oft-referenced rule of thumb is "essentially worthless." Looking at the actual numbers, using this 300 DPI rule you can take the horizontal or vertical resolution of your image, depending on the orientation of your final print, and divide it by 300 to get the resulting maximum size in...
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Kategorien: Fotografie

Panasonic and Fujifilm reveal joint sensor development, offering global shutter

Digital Photography Review - Do, 04/02/2016 - 19:38
Cross-sectional image of conventional Back Side Illumination (BSI) CMOS sensor compared to Panasonic's Organic Photoconductive Film (OPF) sensor. (Image courtesy of Panasonic.)

Panasonic has announced that it has developed a new sensor using Organic Photoconductive Film (OPF), developed by Fujifilm, that is capable of recording a much wider range of tones (up to 3 EV greater dynamic range) than current silicon-based sensors, and in which each pixel is read out simultaneously to effect a true global shutter.

We first heard about this collaboration back in 2013, and it appears that the companies have made progress during that time. Similar to InVisage Quantum Film technology, the OPF sensor employs a thin, light-sensitive film on top of CMOS silicon circuitry. Panasonic says that the separation of the light conversion medium and electronic charge storage removes some design trade-offs that need to be made with conventional CMOS designs. The design allows for a larger active pixel area that makes it 1.2x more sensitive to light than normal photodiodes. Decoupling the photoconversion and storage areas also allows for the ability to store more total charge (higher full well capacity), resulting in 10x, or 3 EV, greater dynamic range. 

Additionally, the OPF layer is only 0.5 microns thick, or four to six times thinner than silicon photodiodes that are typically 2-3 microns in depth. According to Panasonic this expands the incident angle of light that can be collected to 60 degrees, compared to 30-40 degrees for conventional silicon sensors, which should allow greater flexibility in lens design. It should also help reduce false color and vignetting.

In addition to better sensitivity and dynamic range, the new technology brings other benefits as well. In particular, the OPF-based sensor will provide global shutter, by allowing all pixels to be exposed essentially at the same time by turning on and off the entire photosensitive area at once. The net effect is that all the lines of the sensor are essentially exposed simultaneously, as opposed to line-by-line as is the case with traditional 'rolling' electronic shutters. This helps avoid the dreaded ‘jello effect’ often seen in video, or the distortion of fast moving objects. It also helps avoid flickering and banding with artificial light sources, which with a 'rolling' shutter otherwise result in different rows on the sensor being exposed while the pulsating light source is on vs. off.

When combined with Panasonic’s historical strength in video-oriented products this will likely get the attention of the videography crowd. The potential benefits don't stop there though. Panasonic has also developed a method of recording sequences of images at slightly different exposure values, that it calls Variable Sensitivity Multiple Exposure Technology. The process can track the direction of motion in the scene by tracing the subject as it moves across the scene becoming gradually darker from one frame to the next. If the camera knows it applied less exposure to the second frame than to the first, it can determine in which direction the subject is moving and at what speed. This could be of great assistance to AF algorithms.

The company is not absolutely clear about what practical uses it will put this new sensor to, but says ‘We expect this technology to be used widely in motion capture applications and also extend to other applications that have been thought to be difficult to realize unless high saturation global shutter or variable sensitivity multiple exposure.’ Panasonic is also developing a system for using cameras that replace wing mirrors in cars, and this technology will probably see the light of day in that area first, but the lessons learned will be very useful for its regular camera business. 

Press release:

Panasonic develops 10times Higher Saturation & Highly Functional Global Shutter Technology by controlling of Organic-Photoconductive-Film on CMOS Image Sensor

Osaka, Japan - Panasonic Corporation today announced that it has developed a new highly functional global shutter[1] technology for CMOS image sensor using organic photoconductive film (OPF)*1. This technology enables to capture high speed moving object up to 10 times brighter*2 scene in global shutter mode. In OPF CMOS image sensor, charge-storage function and photoelectric-conversion function can be set independently. By utilizing the unique feature of OPF CMOS image sensor, this technology solves the degradation of saturation signal[2] in conventional image sensor with global shutter function. Motion direction can be detected from acquired object's signal level in one picture by fine control of shutter sensitivity by changing applied voltage to OPF which is hardly realized by conventional CMOS image sensors.

The newly developed highly functional global shutter technology contributes to high speed image sensing of moving objects without image distortion which appears in conventional shutter operation under very bright scene. We expect this technology to be used widely in motion capture applications and also extend to other applications that have been thought to be difficult to realize unless high saturation global shutter or variable sensitivity multiple exposure.

The new technology has the following advantages.

1. Wide incident angle (60 degrees), high sensitivity, high saturation and highly-functional circuits due to a unique feature of OPF, in which an OPF for photoelectric-conversion and a readout circuits are independent.

2. High saturation signal up to 10 times larger*3 than conventional image sensors with global shutter function due to Photoelectric Conversion Controlled Global Shutter Technology.

This development is based on the following new technologies.

1. CMOS Image Sensor Design Technology, in that, an OPF photoelectric-conversion part and a circuit part can be designed independently.

2. Photoelectric Conversion Controlled Global Shutter Technology that is realized by controlling of organic photoconductive film sensitivity.

3. Variable Sensitivity Multiple Exposure Technology which can detect the motion and its direction by changing image capturing sensitivity in each frame.

Panasonic holds 60 Japanese patents and 41 overseas patents (including pending) related to this technology.

Panasonic will present part of the research at the international conference ISSCC (International Solid-State Circuit Conference) 2016 which is to be held in San Francisco, USA on January 31 to February 4.

Notes:

*1: We are using an organic photoconductive film (OPF) that FUJIFILM Corporation has developed.

*2: Saturation signal per pixel area, compared with conventional silicon based CMOS image sensor with global shutter function.

More on the Technology

1. The OPF CMOS Image Sensor Design Technology, in that, photoelectric-conversion part and a circuit part can be designed independently.

The conventional image sensor consists of a silicon photodiode for capturing light, metal interconnects and an on-chip micro-lens. And, both a photoelectric-conversion function and a signal charge-storage function are executed by a silicon photodiode. On the other hand, in an OPF CMOS image sensor, a photoelectric-conversion function is executed by an OPF, instead of a silicon photodiode, and a signal charge-storage function is executed by circuits beneath the OPF. Both functions are almost independent, so an OPF CMOS image sensor can achieve the following features.

Expansion of the incident light range to 60 degrees and reproduction of faithful color.

An OPF with high optical absorption coefficient[3], instead of a silicon photodiode, is adopted, the thickness of an OPF has been reduced to just 0.5 microns, four to six times thinner than silicon photodiodes. Since the conventional silicon photodiode needs at least 2 - 3 microns in depth, the range of incident angles was limited to around 30 - 40 degrees. An OPF, achieved with the OPF CMOS image sensor technology, has enabled the expansion of this range to 60 degrees, efficiently utilizing light entering at an angle for faithful color reproduction with no color mixing. It also gives greater flexibility in lens designs, facilitating the reduction of overall camera size.

Boost of sensor sensitivity by 1.2 times compared to conventional silicon image sensors to deliver clear images, particularly in dark conditions.

The transistors and metal interconnects in each pixel, fabricated using Panasonic's semiconductor device technology, are coated with an OPF. The area of the light receiving section becomes limited in conventional image sensors because of the existence of metal interconnects and the need to form a light shield film to prevent light incidence into areas other than the photodiode in each pixel. However, an OPF CMOS image sensor technology coats the sensor with an OPF, which can harvest all the light received on the sensor. This unique structure and high quantum efficiency of OPF boosts sensor sensitivity by 1.2 times compared to conventional silicon image sensors to deliver clear images, particularly in dark conditions.

Cross-sectional image of conventional Back Side Illumination (BSI) CMOS image sensor and OPF CMOS image Sensor

Design of OPF and circuits completely independent and realization of high-performance (high-saturation)

In the architecture of an OPF CMOS image sensor, the OPF, that converts light into electric signals, and the circuits, that store electric signal charges and readout electric signals, are designed completely independently. Therefore, by selecting an OPF, photoelectric-conversion characteristics, wavelength, sensitivity, etc., can be set with flexibility.

Moreover, in conventional image sensors, it is necessary to place both a silicon photodiode and circuits (transistors and capacitors) on silicon substrate in each pixel, so an area of circuits is limited. On the other hand, in an OPF CMOS image sensor, it is not necessary to place a silicon photodiode, so high-performance circuits, such as high-speed or wide dynamic range[4], can be formed on a silicon substrate.

In particular, in an OPF CMOS image sensor, by providing a large capacitor for storing signal charge, a saturation value[2] of electric signal can be significantly increased from conventional image sensors.

2. Photoelectric Conversion Controlled Global Shutter Technology that is realized by controlling of organic photoconductive film sensitivity.

Conventional CMOS image sensors with global shutter function require storage located near photoconversion area which makes it difficult to simultaneously shrink the pixel size and enlarge the saturation signal. Developed "Photoelectric conversion controlled global shutter technology" realizes shutter function by controlling of photoelectric conversion efficiency by only modulating applied voltage to OPF, without additional in-pixel circuit and no degradation of saturation signal. And developed "high saturation pixel technology" by pixel gain switching operation can capture under extremely bright scene, up to 10 times or more saturation signal per unit square pixel than conventional CMOS image sensor with global shutter function. This technology will solve imaging problems caused by rolling shutter distortion, flash bands[5] and LED flickers[6] in very bright scene.

Comparison of Global shutter pixel structure

3. Variable Sensitivity Multiple Exposure Technology which can detect the motion and its direction by changing image capturing sensitivity in each frame.

Conventional multiple exposure cannot detect the direction of motion because the capture sensitivity is fixed. Panasonic have developed "variable sensitivity multiple exposure technology" by controlling the voltage applied to OPF with elapse of time, which is hardly realized in conventional silicon based image sensor. We can get several images of different exposure time and different exposure sensitivity in one picture that enables character recognition by choosing optimum exposure time, so direction of motion can be detected by acquired object's signal level. This technology enables sensing of moving object detection and motion directions.

Technical Terms:

[1] Global shutter

Shutter operation which can capture the image at the same time in all pixels.

Ordinary CMOS image sensor operates in rolling shutter mode in which exposure and shutter operation is executed row by row.

[2] Saturation/Saturation signals

Maximum amount of electric signal that can be handled by image sensors. Receiving a signal greater than this value leads to highlight clipping.

[3] Optical absorption coefficient

A constant value that indicates how much light is absorbed into a material, when incident light enter to the material.

[4] Dynamic range

Range of brightness that can be captured. (the ratio between highest and lowest signal can be captured by image sensor)

[5] Flash band

stripe shaped contrast appears in captured image, because light flashes during image sensor capture the image row by row pixel (rolling shutter operation).

[6] LED flicker

Imaging phenomenon resulting in incomplete image capture, caused by a LED's (traffic, headlights, signs, etc.) frequency and a camera's imaging speed.

Captured images of rotating propeller by different shutter mode

Multiple exposure images by Variable exposure time and sensitivity

Kategorien: Fotografie

Delayed: Nikon Japan pushes D500 to end of April

Digital Photography Review - Do, 04/02/2016 - 17:43

Nikon shooters have waited a long time for a D300S replacement, and it appears that they're going to have to keep waiting a little longer. Nikon Japan has released a statement (in Japanese) pushing the D500's initial March release back to late April 2016. Nikon cites high demand for the camera as the cause of the delay. It seems that the D500's battery grip and WT-7A wireless transmitter are also delayed.

Come April, the D500 will be available for $1,999.95 body only or with the 16-80mm F2.8-4E ED VR lens for $3,069.95.

Kategorien: Fotografie

Sony raises the bar: We talk with Sony’s top lens designer about what makes their latest lenses so special

Imaging Resource - Do, 04/02/2016 - 17:28
  Mr. Motoyuki Ohtake Distinguished Engineer Opto Design Department, Core Technology Division, Digital Imaging Business Group Sony's three new FE-series (full-frame E-mount) lenses promise a new level of optical performance, both in terms of sharpness and resolution as well as in producing beautiful bokeh. In the general presentation for these lenses (see a recording of our live stream of the event here), mention was made of several new technologies that made the dramatic step in lens quality possible.  The three...
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Kategorien: Fotografie

Focus on your ground game for Super Bowl 50, FAA bans drones within 32 miles of stadium

Imaging Resource - Do, 04/02/2016 - 15:57
"Be a responsible pilot" and leave your drone at home for Super Bowl 50 in Santa Clara, California because Super Bowl 50 is a No Drone Zone this Sunday. On Super Bowl Sunday (February 7th) from 2 p.m. to 11:59 p.m. local time, all unmanned aircraft operations within 32 miles of Levi's Stadium in Santa Clara, California are prohibited. In an effort to get the word out, the Federal Aviation Administration (FAA) has been sharing a video they've produced (see below) telling fans to bring their jerseys, face paint, and team spirit to the big game, but not their...
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Kategorien: Fotografie

Fuji X-Pro2 First Shots: Flagship Fuji rangefinder-styled body struts highest resolution X-trans sensor

Imaging Resource - Do, 04/02/2016 - 11:56
    About 5 years ago Fuji dropped a rather unusual bomb on the digital camera world when they debuted the X100, a camera that literally looked and felt like it walked straight out of the early 1960's. It was quirky to use, had some real operations issues, and took quite a lot of flack for the retro design from some corners of the camera world. This was of little consequence to Fuji of course, because they had a bigger problem on their hands in that for some time they couldn't even keep up with growing consumer demand! Then a year...
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Kategorien: Fotografie

Portrait time: Sample gallery from Sony's new 85mm F1.4 GM lens

Digital Photography Review - Do, 04/02/2016 - 08:00
$(document).ready(function() { SampleGalleryV2({"containerId":"embeddedSampleGallery_2269056192","galleryId":"2269056192","isEmbeddedWidget":true,"standalone":false,"selectedImageIndex":0,"startInCommentsView":false,"isMobile":false}) });

After Sony showed off its a6300 and trio of new lenses, our staffers were able to grab an a7R II and start shooting. Above we've put together a small selection of images taken with Sony's new 85mm F1.4 GM portrait lens. 

Kategorien: Fotografie

Canon G5X Review: Enthusiast-oriented compact improves on G7X’s design, but issues remain

Imaging Resource - Do, 04/02/2016 - 06:52
Just over a year after releasing the compact PowerShot G7X, Canon has taken the G7X's internals and put them into the well-designed PowerShot G5X. Utilizing the same 20.2-megapixel backside-illuminated 1"-type sensor and 24-100mm f/1.8-2.8 equivalent lens, the G5X adds numerous features to the camera body itself while maintaining similar imaging performance of its sibling. The first thing you'll notice is that the G5X looks a lot different than the G7X. With a 2.36-million-dot Organic LED electronic viewfinder, a front grip, numerous additional controls, and...
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Kategorien: Fotografie

Hands on with Sony's a6300 and G Master lenses

Digital Photography Review - Mi, 03/02/2016 - 23:24
Hands on with Sony's a6300 and GM lenses

At a press event in New York City, Sony unveiled a new mirrorless camera and three new lenses – but not just any mirrorless camera, and not just any lenses. The Sony a6300 is the much-anticipated followup to the very successful a6000. And for its full-frame range, Sony introduced a new lens class: G Master. The company has placed the FE 70-200mm F2.8 GM OSS, FE 85mm F1.4 GM and FE 24-70mm F2.8 GM in a category unto themselves, with an emphasis on resolving power and bokeh. We spent some brief moments with all of the new hardware – take a look.

Sony a6300

Front and center of this morning's announcements is the a6300. Boasting a newly designed 24MP APS-C CMOS sensor, the camera's most impressive feature is arguably its 425 phase-detect AF points with 'Advanced 4D Focus.'

The a6300's 4K video tech is impressive too. The camera reads the equivalent of 6K's worth of data from its sensor and downsizes it to 4K/UHD - without pixel binning - which promises a big boost in video quality.

Sony a6300

Sony stuck with a familiar design when shaping the a6300, including these top plate mode and command dials, which will look very familiar to a6000 users. 

Sony a6300

It may look like its predecessor on the outside, but the a6300 uses a sturdier magnesium-alloy construction, with weather-sealing.

Sony a6300

The rear panel looks much the same as the a6000 as well, except for the addition of a switch toggling between AEL and AF/MF. The tilting 3" 921k-dot LCD is still present, and still not a touchscreen, but the viewfinder has been significantly upgraded to a 2.36 million-dot OLED panel.

Sony a6300

A pop-up flash is another welcome carryover from the a6000. With a little pressure, the flash can be tilted backward at a slight angle for a bounce effect.

Sony a6300

The Sony a6300 is expected to ship in March, and will sell for $1000 body-only or $1150 paired with a 16-50mm F3.5-5.6 power zoom kit lens (not the more expensive 16-70mm F4 seen here).

Sony a6300

Autofocus speed was a strength of the a6000, and the a6300 brings the next evolution of that system with some lofty claims including focus acquisition in as little as 0.05 sec. The a6300 also boasts a minimal blackout period between shots, and can manage to supply a live view feed at up to 8fps - a major breakthrough for mirrorless cameras. 

Sony FE 24-70mm F2.8 GM

The first of Sony's three ultra premium 'G Master' lenses is the FE 24-70mm F2.8 GM. The focus (no pun intended) of the GM lenses is resolution and bokeh, courtesy of high quality glass and a new XA (extreme aspherical) lens element. All three lenses are weather-sealed.

The 24-70 has 18 elements in 13 groups which include the aforementioned XA element, as well as ED and Super ED elements. A Nano AR coating reduces flare and ghosting. The lens also features nine circular aperture blades.

Sony FE 24-70mm F2.8 GM

The minimum focus distance on the 24-70 is 0.38m/15in. with a max magnification of 0.24x. The lens uses 82mm filters. Control-wise the lens has switches for focus mode and zoom lock as well as a stop focus button.

The 24-70mm F2.8 GM will be available in March for $2200.

Sony FE 85mm F1.4 GM

Next is the long-awaited fast 85mm prime. This F1.4 lens has a whopping 11 circular aperture blades - the most of any Sony lens yet - as well as XE and three ED elements.

The lens' Super Sonic wave Motor uses a pair of position sensors to ensure accurate focus.

Sony FE 85mm F1.4 GM

As you can see, the 85mm F1.4 GM has a manual aperture dial (with switchable click-stops), AF/MF switch, and focus hold button. 

You'll be able to pick up this monster of a lens in March for $1800.

Sony FE 70-200mm F2.8 GM OSS

The 70-200mm F2.8 steps into Sony's FE line as the first fast constant aperture tele-zoom, looking the part of a sports shooter's lens. Sadly, working samples were not available for press to use at the launch event, and its price is still TBD.

Sony FE 70-200mm F2.8 GM OSS

What we do know is that it will have 23 elements in 18 groups, which includes one XD, four ED and two Super ED elements. Like the 85mm lens, the 70-200 has 11 circular aperture blades. It uses two focus motors to optimize speed and accuracy. The front elements have a ring-type SSM while the rear parts use a double linear motor. The minimum focus distance is just 0.96m/38in.

Controls are as you'd expect from a high-end tele-zoom. There are switches for AF/MF, focus distance limit, image stabilization, and IS mode. There are two IS modes: standard (mode 1) and panning (mode 2). The lens also has a zoom lock and buttons for holding focus.

Kategorien: Fotografie

Video: A quick look at the Sony a6300

Digital Photography Review - Mi, 03/02/2016 - 23:05

Earlier today Sony introduced its new a6300 APS-C mirrorless camera, an update to the very popular a6000 model. DPReview's Richard Butler was at the event in person and had a chance to get some hands-on time with the new body. In this video he gives us a quick look at Sony's new crop-sensor flagship camera. 

For more information about the Sony a6300, as well as full specifications, have a look at our news story.

Kategorien: Fotografie