cogitech Offline Upload & Sell: On
|
Jorgen Udvang wrote:
I'm curious. Is this a lens that came prior to the 28-105mm f/2.8? A friend of mine has that one (AF version, EOS mount), and is struggling to get sharp photos with his 20D, but that may be an EOS problem.
My guess is that it would be a better performing lens on FF digital. The overall lp/mm of the lens is probably insufficient for the pixel density of the 20D, especially at wider apertures. Stick the same lens on a 5D, and all of a sudden things might change. Using the whole image circle (after all, the lens was designed to be used that way) and taking a lower resolution sample of all that area results in completely different overall usability. Maybe you're not going to print 20"x30" with wide open shots, but it'll still be a much different experience on a 5D as opposed to a 20D.
I have also heard complaints about low contrast with the 28-105/2.8 (which would certainly contribute to the impression of "unsharp" images on a 20D) but I wouldn't let that dissuade me from trying one on FF. Contrast is the least of my PP worries.
I base this opinion on my experience with the Tamron SP 24-135mm. An "OK" lens on a 20D and a fantastic lens on a 5D. This is the sleeper zoom of all time, IMO. Very sharp (yes, to the corners) at the wide end, moving to slightly softer results at the long end, with decent bokeh and macro feature. Amazing value.
Edited on Feb 01, 2008 at 09:41 PM
|