Nikon

Nikon patents full-color RGB sensor

Claims of corresponding document: US2005213221

1. A color separation unit of a solid-state image sensor comprising:
a microlens which condenses light to an opening provided in a mask layer;
a first optical element which receives light condensed by said microlens through said opening, to divide the light into light to be transmitted and light to be reflected in accordance with wavelengths of the light received;
a first light receiving surface which receives light passed through said first optical element;
a second optical element which receives light reflected by said first optical element to divide the light into light to be transmitted and light to be reflected in accordance with wavelengths of the received light different from those of said first optical element;
a second light receiving surface which receives light reflected by said second optical element;
a third optical element which receives and reflects light passed through said second optical element; and
a third light receiving surface which receives light reflected by said third optical element.

2. The color separation unit of the solid-state image sensor according to claim 1, wherein said first and second optical elements are dichroic mirrors.

3. The color separation unit of the solid-state image sensor according to claim 1, wherein said first optical element passes blue light to lead the blue light to said first light receiving surface, and reflects green and red light to lead the green and red light to said second optical element.

4. The color separation unit of the solid-state image sensor according to claim 3, wherein said second optical element reflects the green light to lead the green light to said second light receiving surface, and passes the red light to lead the red light to said third optical element.

5. The color separation unit of the solid-state image sensor according to claim 4, wherein said third optical element reflects the red light.

6. A color separation unit of a solid-state image sensor comprising:
a microlens which condenses light to an opening provided in a mask layer;
a first optical element which receives light condensed by said microlens through said opening, to divide the light into light to be transmitted and light to be reflected in accordance with wavelengths of the light received;
a first light receiving surface which receives light passed through said first optical element;
a second optical element which receives light reflected by said first optical element to divide the light into light to be transmitted and light to be reflected in accordance with wavelengths of the received light different from those of said first optical element;
a second light receiving surface which receives light reflected by said second optical element;
a third optical element which receives light passed through said second optical element to divide the light into light to be transmitted and light to be reflected in accordance with wavelengths of the received light different from those of said first and second optical elements; and
a third light receiving surface which receives light reflected by said third optical element.

7. The color separation unit of the solid-state image sensor according to claim 6, wherein said first, second, and third optical elements are dichroic mirrors.

8. The color separation unit of the solid-state image sensor according to claim 6, wherein said third optical element reflects red light and absorbs infrared rays.

9. The color separation unit of the solid-state image sensor according to claim 6, wherein said first optical element passes blue light to lead the blue light to said first light receiving surface, and reflects green and red light to lead the green and red light to said second optical element.

10. The color separation unit of the solid-state image sensor according to claim 9, wherein said second optical element reflects the green light to lead the green light to said second light receiving surface, and passes the red light to lead the red light to said third optical element.

11. The color separation unit of the solid-state image sensor according to claim 10, wherein said third optical element reflects the red light.

 


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Sony

Sony/Alpha Full Frame Lenses: 300mm f/4 and 600mm f/4 or200mm f/2.8? (Photo)

 

sony_400mm-f2.8-masterchong.jpg

 

One visitor to PMA who has contacted me remains sure that the larger lens will be a 400mm f/2.8
because its size is so similar to the Canon of that specification.
Because of the length of the lens hood, which reveals no front glass in
other views of the lens, it is impossible to tell.

 

sony-600mm-f4-masterchong.jpg

 

The grab handle is
identically positioned to the 600mm f/4 and although the rear
barrel sections are stepped in different thicknesses, their overall
length and scale relative to the filter (dummy) slot and rear mount,
and the control buttons, all compare directly to the old 600mm f/4.
However, a 400mm f/2.8 and 600mm f/4 share the same approximate front
group size. It just looks rather long for a 400mm given advanced in
lens design.

 

Text and Imges from PhotoClubAplha.com

Images from WATCH-Japan




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Sony

New Sony Alpha, but when?

 

sony_06lalpha-masterchong-1.jpg
Upcoming Sony Alpha Side View

 

Sony PMA 2007 press release:

(Alpha) Digital SLR Camera
The
following camera bodies and interchangeable lenses will be exhibited in
addition to the current DSLR-A100 digital SLR camera and 21
interchangeable lenses, including Carl Zeiss® products. With the
expanded product portfolio, α is set to broaden its system
configuration and appeal to a wider user base.

Exhibited Prototypes
New camera model (body) targeting high-end amateur users
* Positioned higher than the current DSLR-A100 digital SLR camera
* Achieves high level of overall picture quality through development of new image sensor and
* Bionz™ image processing engine
* Super SteadyShot® image stabilization inside
* Realizes high performance that meets expectations of high-end amateur users
Flagship model (body)
* The highest-end α (Alpha) product
* Achieves high level of overall picture quality through development of new image sensor and
* Bionz™ image processing engine
* Super SteadyShot® image stabilization inside
* Realizes high performance that lives up to even professional users’ demanding requirements.

One of the two prototypes stated above will be on sale within this calendar year.

 

 

sony_alpha-masterchong-1.jpg
Upcoming Sony Alpha Back View

According to the press release, I prefict thatonwo f it will be launched between August and October

2007.

 

Images from WATCH-jp

 




Updates

High Speed Camera 2000FPS (video)




Canon

Lens Test: Canon 50mm f/1.2L USM AF

Low light shooting
At f/1.2, the lens shares the maximum aperture of any lens in Canon’s current range. As such, it is ideal for shooting indoors using available light – a typical requirement of photojournalists and wedding photographers not wishing to disturb or influence a scene with flash.

Fast auto focus
Canon’s latest Ring-type Ultrasonic Motor USM (USM), high speed CPU and improved AF algorithms combine to ensure rapid, highly responsive auto focus. Canon’s Ring-type USM holds the lens with precision and accuracy, the instant it arrives at the correct focus and without overshoot, and features full-time manual focus override.

Portrait photography
The combination of an almost circular aperture diaphragm for attractive bokeh (evenly graduated blurring of out-of-focus areas) and the extremely narrow depth of field at its widest aperture combine to make this an ideal portraiture and studio lens. The f/1.2 aperture can be used to bring tension to a shot by keeping the focus sharp on the subject’s eyes while blurring other facial features.

L-series construction
The L-series is Canon’s elite professional lens range, designed and built to meet the needs of the most demanding professional photographers. To match the weather resistance afforded by EOS-1 series camera bodies, seals and gaskets and a lens mount O-ring prevent the ingress of dust and moisture to keep pros shooting in inclement conditions.

Aspheric element
To combat the softening caused by spherical aberration in conventional wide aperture lenses, a large aspherical lens element with precise variable curvature is incorporated into the 8 lens, 6 group construction. The aspheric element ensures high sharpness and contrast throughout the focus and aperture range.

Super Spectra coatings

In addition to optimised lens shapings to reduce reflections and the use of anti-reflective material inside the lens barrel, the EF 50mm f/1.2L USM employs Canon’s patented Super Spectra lens element coatings. These suppress flare and ghosting – more prone to occur with digital cameras due to reflection off the image sensor. By increasing light absorption, coatings reduce reflections off lens element surfaces to deliver crisp, undistorted images with natural colour balance.

E-TTL II flash integration
The EF 50mm f/1.2L USM transmits distance information to the E-TTL II flash system of all current model digital EOS cameras, improving flash exposure metering when used in conjunction with Canon’s range of EX Speedlite flash units.

Accessories and the environment
The EF 50mm f/1.2L USM comes with a cylindrical lens hood and lens pouch.
In keeping with Canon’s Kyosei philosophy of living in harmony with the environment, the lens features only lead-free glass.

Canon EF 50mm f/1.2 L USM Lens Review


Hands on and In the Lab Test by PopPhoto


Flickr Canon 50mm f/1.2L USM AF Sample Photo

 




Canon

Full Lab Test: Canon EOS 1D Mark III

Canon traded megapixels for speed with this model. The Nikon D2Xs, another camera in the pro class, captures 12.4 megapixels on a 1.5x crop factor sensor at full resolution at 5 fps, and drops resolution to 6.8 megapixels (and a 2x crop factor) for a high-speed burst of up to 35 JPEGs at 8 fps. The Mark III's full-frame stablemates, the 12.8 megapixel Canon EOS 5D and the 16.6MP Canon EOS 1Ds Mark II, capture images at a more leisurely pace: 3 fps for 60 JPEGs and 4 fps for 32 JPEGs, respectively.

Performance
As our testing analyst Matthew Fitzgerald quipped, the Canon 1D Mark III is "a rocket ship." The camera took 0.1 second to start up and capture its first JPEG, then took 0.4 second between shots when capturing subsequent JPEGs. When shooting raw, the camera took 0.5 second between shots. Shutter lag measured 0.4 second in our high-contrast test, which mimics bright shooting conditions, and 1.1 seconds in our low-contrast test, replicating dim shooting conditions. Our lab tests were performed with Canon's EF 50mm f/1.2L USM lens.

Image Quality
Images shot with the Canon EOS 1D Mark III can be absolutely stunning. Colors look extremely accurate, and the automatic white balance does an excellent job of neutralizing colors under a variety of lighting situations. The only times it became confused was in situations in which there was mixed lighting, and even then it produced pleasing, if not absolutely spot-on results. If paired with a sharp lens, the 1D Mark III can produce images with a vast amount of fine detail.

However, where this camera really shines is its ultralow noise. Even at its highest sensitivity setting of ISO 6,400, we were able to make pleasing prints. On a monitor you'll see a covering of fine, multicolored grain, but there's still an impressive amount of shadow detail and finer detail, especially for such an extreme setting. At lower sensitivities, images are extremely clean, and noise doesn't even begin to show up significantly on monitors until you reach ISO 800

 

Masterchong.com –
An analysis of EOS-1D Mark III autofocus performance

Masterchong.com –
EOS-1D Mark III in Singapore

Masterchong.com –
First Look of Canon EOS-1D Mark III

The world’s fastest D-SLR – remastered EOS-1D Mark III: The new benchmark
Canon EOS-1D Mark III Review Roundup and Sample Photos
Canon EOS 1D Mk. III Experience Report
Canon EOS 1D Mark III Digital SLR Camera Review
Canon EOS 1D Mark III by CNET
Cann EOS 1D MkIII Preview by Photo.NET
Hands on and In the Lab Test by PopPhoto
Flickr Canon EOS 1D Mark III Sample Photo