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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
Canon 17-85mm lens at 17mm f4
Canon 18-55mm lens at 18mm f3.5
Canon 17-40mm lens at 17mm f4
17-85mm EF-S at 17mm f4.0
18-55mm EF-S at 18mm f3.5
17-40mm EF L at 17mm f4
Canon 17-85mm lens at 17mm f8
Canon 18-55mm lens at 18mm f8
Canon 17-40mm lens at 17mm f8
17-85mm EF-S at 17mm f8
18-55mm EF-S at 18mm f8
17-40mm EF L at 17mm f8
Canon 17-85mm lens at 17mm f16
Canon 18-55mm lens at 18mm f16
Canon 17-40mm lens at 17mm f16
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
Canon 17-85mm lens at 85mm f5.6
Canon 18-55mm lens at 55mm f5.6
Canon 17-40mm lens at 40mm f4
17-85mm EF-S at 85mm f5.6
18-55mm EF-S at 55mm f5.6
17-40mm EF L at 40mm f4
Canon 17-85mm lens at 85mm f8
Canon 18-55mm lens at 55mm f8
Canon 17-40mm lens at 40mm f8
17-85mm EF-S at 85mm f8
18-55mm EF-S at 55mm f8
17-40mm EF L at 40mm f8
Canon 17-85mm lens at 85mm f16
Canon 18-55mm lens at 55mm f16
Canon 17-40mm lens at 40mm f16
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
All words, images, videos and layout, copyright 2005-2012 Gordon Laing. May not be used without permission.

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