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Canon S100 test pictures

Canon S100 camera
12Mp 1/1.7" CMOS.  4000 × 3000 pixel RAW output.
5× optical zoom 5.2 - 26mm (35mm equiv: 24 - 120mm)
Note: In order to make corner detail images comparable to those given elsewhere, the pictures were resized to 2582 × 1937 (5Mp) before cropping.
Canon S100

S100 camera in air (no housing, natural daylight, 35mm equiv. f and aperture as marked)
s100_24 s100_24dt

s100_28 s100_28dt

s100_35 s100_35dt

s100_50 s100_50dt

Pano Tools radial corection coefficients
f a b c d(red) d(green) d(blue) Δd(red) Δd(blue)
24 0.004 -0.018 0 1.0152 1.014 1.0152 0.0012 0.0012
28 0 -0.01 0 1.0105 1.01 1.011 0.0005 0.001
35 0 -0.01 0 1.0102 1.01 1.011 0.0002 0.001
50 0 -0.011 0 1.011 1.011 1.012 0 0.001

The canon S100 zoom lens is very well corrected in the 28 - 50mm range. Its main drawback, for underwater photography, is the relatively large physical length variation of the lens due to the 5× range. Positioning the port so as to avoid collision at the telephoto setting results in the lens entrance pupil being about about 25mm behind the port at the wide setting. This can result in noticeable chromatic aberration when the camera is used underwater with a flat port (see below) or a wide converter. 



Canon S100 camera underwater with flat port
Photographs taken using Recsea WHC-S100 housing (shown right)
Lighting: 2× ikelite Pro 2800 LED video lights
Corner detail pictures were cropped from 2582 × 1937 (5M) pixel images.
35mm equiv. f and aperture as marked. 
s100_fl

fp_s100_24 fp_s100_24dt

fp_s100_28 fp_s100_28dt

fp_s100_35 fp_s100_35dt

fp_s100_50 fp_s100_50dt

Pano Tools radial corection coefficients
f a b c d(red) d(green) d(blue) Δd(red) Δd(blue)
24 0 0.04 0 0.9586 0.96 0.9656 -0.0014 0.0056
28 0 0.035 0 0.9636 0.965 0.9706 -0.0014 0.0056
35 0 0.02 0 0.9786 0.98 0.9856 -0.0014 0.0056
50 0 0.003 0 0.9956 0.997 1.0026 -0.0014 0.0056





David W Knight
© Cameras Underwater Ltd. 2012 
Pictures by Steve Knight and David Knight
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