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  Reviews by: --Lucio--  

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Sigma 50mm F1.4 EX DG HSM

Review Date: Nov 1, 2011 Recommend? yes | Price paid: Not Indicated | Rating: 8 

Pros: reasonably sharp in the center when used wide open, build quality
needed calibration, not tack sharp when stopped down, some CA, heavy and bulky, diffraction from f/8 on on APS-C, expensive

Canon EF mount, APS-C (40D). Here is a test I did, showing both the diffraction beyond f/7.1 and the now-corrected autofocus issue:

Canon EF 35mm f/2

Review Date: Nov 1, 2011 Recommend? yes | Price paid: Not Indicated | Rating: 8 

Pros: light, small, cheap, reasonably sharp
purple fringing at wide apertures, soft wide open; lens hood does not come with the lens (and arrived broken)

Here is a sharpness test on my 40D showing the lens is best usable from f/2.5 to f/9 (and maybe f/11):

Canon EF-S 10-22mm f/3.5-4.5 USM

Review Date: Feb 22, 2008 Recommend? yes | Price paid: Not Indicated | Rating: 8 

Pros: ultra-wide, flare resistant, distortion free, lightweight, CA is manageable with DPP, fast & quiet AF, close focus distance, decent build quality, non-rotating front element
center not so sharp, very soft borders, vignetting wide open, some CA, a blue cast (or 40D WB issue ?), expensive, not weather-sealed, EF-S mount only

This lens is really fun to use but sometimes it is hard to find a great composition with such an ultra-wide lens. See some web-sized photos of my latest ski touring outings in the following galleries:
(gear: 40D + 10-22 + Hoya UV or PLC filter, RAW files generally developed in DPP).