Nikon patents full-color RGB sensor

Here's an interesting patent from Japan's Nikon Corp.

Color separation device of solid-state image sensor

A microlens condenses incident light to an opening. Light passed through the opening reaches a first dichroic mirror. The first dichroic mirror passes blue light and reflects green and red light. Only the blue light is incident on a first light receiving surface. The first dichroic mirror leads the green and red light to a second dichroic mirror. The second dichroic mirror passes the green light and reflects the red light. Only the green light is incident on a second light receiving surface. The second dichroic mirror leads the red light to a third dichroic mirror. The third dichroic mirror reflects the red light. Therefore, the red light is incident on a third light receiving surface.







Some details:

Inventors: Hoshuyama; Hideo (Kawasaki, JP)
Assignee : Nikon Corporation (Tokyo, JP)
Appl. No. : 10/732,462
Filed : December 11, 2003


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


sony_logo.jpg Sony has also made available, via hard-to-find areas of international websites, images of the next round of Sony SAL lenses to hit the market. Details of the specifications have been leaked, probably from the June 2007 meetings in Japan. All the new lenses are full-frame, confirming the rumours that the ‘A-500′ due in 2008 will be a full-frame or 1.1X model



The 400mm f/4.5 and 600mm f/4 Sony SAL G (D) apochromatic telephotos were known to be in the pipeline from the start. They are revised versions of the classic Minolta G glass, and are presumed to use SSM sonic motor focusing because it was known that Konica Minolta already planned to incorporate SSM into these long lenses. However the prototypes shown and photographed may be a 300mm f/4 and 600mm f/4, or even a 200mm f/2.8 (looking at the size of the AF hold button on the smaller lens). The relative size of the mount, the tripod collar handgrip and the rear filter slot indicate that the larger lens is the 600mm. Statements that the smaller one is a 400mm f/4 seem very unlikely judging from the mount size and the tripod collar. It looks most like a new 300mm f/4 but could be a focal length we have not seen before, like 240mm or 280mm, or an aperture like f/3.5 instead of f/4.



New Sony Alpha, but when?

sony_logo.jpg I am interested with when will Sony launch their higher end dslr. The codename are said to be A300 and A500, some suggested A10.


Upcoming Sony Alpha Front View



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

This speedy full-frame 50mm f/1.2L ($1,400, street) fills a vacancy left by the demise of Canon's 50mm f/1.0L four years ago. The company's only L-series normal lens, it's the fastest normal AF lens on the planet.



The EF 50mm f/1.2L USM features

* Latest Ultrasonic Motor (USM) for fast and near silent auto focus
* Full-time manual focus override
* Super Spectra coatings and optimised lens element shaping to suppress flare and ghosting
* Environmental seals providing dust and moisture resistance
* Circular aperture diaphragm for beautifully even background bokeh and ‘removal’ of distracting backgrounds
* Distance information passed back to the new E-TTL II flash algorithm of all current model digital EOS cameras
* Minimum focus distance 45cm
* Lens hood and pouch included in the box.




Full Lab Test: Canon EOS 1D Mark III

Since Canon announced their new flagship 10.1 megapixel high-speed professional DSLR, the Canon EOS 1D Mark III (street: $4500) back in March, we've been itching to put it through our battery of lab tests. Photojournalists, sports photographers and hardcore enthusiasts, among others, have been chattering about this camera online, eagerly awaiting delivery of a promised unit, or complaining about being stuck in back-order hell.



Perhaps you've already heard about the feature set of this camera: ISO 50-6400, 1.3x conversion factor, 10 frames per second with a JPEG burst of up to 110 full-resolution shots (or 22 RAW plus JPEG), Dual Digic III processors, 14-bit analog-to-digital conversion, live preview shooting on the 230,000 pixel 3 inch LCD, sensor-shake dust removal, and a host of other upgrades big and small.