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Canon EF 50mm f/1.4 USM

ef50mmf_14usm_1_
Review Date: Oct 11, 2010 Recommend? no | Price paid: Not Indicated | Rating: 7 

 
Pros: cheap
Cons:
poor center at least to f2.8

Compared this lens to a Voightlander 40mm f2 at equivalent image size. On Canon 5DMII from f1.4-2.8 this lens is soft in the center relative to the Voightlander, but a bit sharper at the extremes of the frame. Hazing/veiling at f1.4 but this is not unexpected.

 
Canon EF 28-105 F/3.5-4.5 II USM

ef_28-105_35
Review Date: Dec 20, 2005 Recommend? yes | Price paid: Not Indicated | Rating: 8 

 
Pros: Low price, almost inaudible motor, light weight.
Cons:
Too soon to tell

Compared this new lens to new Sigma 28-70 EX DG and new Canon 18-55 kit lens. The target was a bookshelf, lots of fine print. The Canon 28-105 had better resolution and contrast at 28, 50 and 70mm than the Sigma at both f5.6 and f8. The Sigma is a real dissapointment at f2.8-5.6 at the 50mm focal length and doesn't sharpen up until f8. At 70 mm both the Canon and Sigma were comparable at the center af f5.6,f8, but again, the field edge was clearly better with the Canon. I returned the Sigma. The kit lens was comparable to the 28-105 at 28mmf8 but couldn't hold up at f5.6. The most pronounced differences were noted at the edge of the field at all focal lengths and apertures. While the kit lens can show good sharpness in the center, it's weakness is the field edge and this isn't helped much even at f8.

haven't compared it to my Canon 50f1.4 yet but my quick estimate is that it will not be too far behind in resolution.

A good purchase

Denton