Canon EF-S 17-85mm f4~5.6 IS USM DSLR lens full review Cameralabs corner sharpness results

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Canon EF-S 17-85mm f4~5.6 IS USM lens review Gordon Laing, December 2005

Outdoor / Resolution / Corner sharpness / Fringe and macro / Geometry / Vignetting

Canon EF-S 17-85mm corner sharpness, with EOS 350D / XT

To measure corner sharpness we photographed the standard ISO 12233 test chart with each lens using the Canon EOS-350D / Digital Rebel XT set to its best quality JPEG settings. Each lens was tested at its widest and longest focal lengths and with various apertures using Aperture Priority mode. The crops are taken from the lower left corner of the chart and presented here at 100%.

The Canon 17-85mm lens shows the greatest distortion at wide angle, and unlike its rivals, the corner sharpness doesn't greatly improve by closing the aperture. Corner sharpness at telephoto is much better, especially at f8 and up.

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Canon EF-S 17-85mm f4~5.6 IS USM		Canon EF-S 18-55mm f3.5~5.6		Canon EF 17-40mm f4.0L USM

17-85mm EF-S at 17mm f4.0		18-55mm EF-S at 18mm f3.5		17-40mm EF L at 17mm f4


17-85mm EF-S at 17mm f8		18-55mm EF-S at 18mm f8		17-40mm EF L at 17mm f8


17-85mm EF-S at 17mm f16		18-55mm EF-S at 18mm f16		17-40mm EF L at 17mm f16

Canon EF-S 17-85mm f4~5.6 IS USM		Canon EF-S 18-55mm f3.5~5.6		Canon EF 17-40mm f4.0L USM

17-85mm EF-S at 85mm f5.6		18-55mm EF-S at 55mm f5.6		17-40mm EF L at 40mm f4


17-85mm EF-S at 85mm f8		18-55mm EF-S at 55mm f8		17-40mm EF L at 40mm f8


17-85mm EF-S at 85mm f16		18-55mm EF-S at 55mm f16		17-40mm EF L at 40mm f16

Canon 17-85mm results continued...

Outdoor / Resolution / Corner sharpness / Fringe and macro / Geometry / Vignetting

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