11 Jul
image of Fujifilm FinePix S200EXR

The Fujifilm FinePix S200EXR is an SLR-like fixed lens camera based around a 1/1.6″ Super CCD EXR image sensor with a resolution of twelve megapixels, capable of yielding images with maximum dimensions of 4,000 x 3,000 pixels. The Super CCD EXR sensor debuted in the F200EXR compact, and the S200EXR marks the first time it has been offered in an SLR-like body, albeit with a fixed lens. The S200EXR’s sensor offers the ability to trade off image resolution for increased sensitivity or dynamic range (more on that in a moment), and resides behind a whopping 14.3x optical zoom lens that offers focal lengths from a 30.5 mm equivalent wide angle to a 436mm equivalent telephoto. The S200’s maximum aperture varies from F2.8 at wide angle to F5.3 at telephoto, and mechanical image stabilization is available to help fight blur from camera shake. ISO sensitivity ranges from 100 to 3,200 equivalents ordinarily. Half the resolution to six megapixels, and ISO 6,400 equivalent becomes available, while halving again to three megapixels yields the Fujifilm S200’s maximum sensitivity of ISO 12,800 equivalent. Images are framed and reviewed either on a 230,000 dot, 2.7″ LCD display with 160-degree viewing angle, or on a 200,000 dot, 0.2″ LCD electronic viewfinder.

The Super CCD EXR chip retains the 45-degree octagonal pixel array that’s the hallmark of Super CCD sensors, and which allows maximum resolution on the horizontal and vertical axes. Where the EXR design most obviously differs from past Super CCD designs is in the arrangement of its Color Filter Array, as shown in the diagram below. Diagonal stripes of green pixels are interspersed with stripes of red and blue pixel pairs. The new arrangement does mean that the horizontal / vertical gap between adjacent red and blue pixels may be increased, thanks to the staggered layout. However, it also brings with it a reduction in the corresponding gaps between green pixels. Since the human eye is more sensitive to green light than to red or blue, the resolution is retained where it is most needed. This isn’t the reason for the change though. By changing its Color Filter Array layout, Fujifilm has allowed itself two potential improvements, useful in low light or high-contrast situations respectively.

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Posted by on July 11, 2011 in cameras


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