stan23 wrote: skibum5 wrote: stan23 wrote:
i\'m sure there are actual flawed copies out there - much like any manufactured product, there\'s going to be some defective ones.
My gripe is for those folks that buy/return multiple copies for what they think is a \'stellar sample\' My opinion is that unless you\'re in a controlled lab environment -- and able to control every single variable in a lens test, you\'re really fooling yourself in thinking your cat/chart shots are going to suffice as a lens test.
you\'d be surprised
for some lenses I\'d agree but others not as much
Maybe.. I\'ve been shooting EOS since \'93, and EOS digital since 2001. In years pass, you\'d be surprised to find many \'dud\' copy lens threads.
most copies aren\'t that bad for most designs
there were a lot fo 17-40 that were wonky at one point, almost always the same side was bad, i returned my first one and the second one was clearly more uniform and much better
otoh i\'ve seen maybe 8 50mm 1.4s and they all seemed pretty similar optically
there were some surprising differences in what parts of the frame were in focus and not in focus shooting various 24-70 II, same exact scene, same exact focus point, at the end of the day most could still be made to do better than other 24-70 type lenses but there are some that place the DOF a bit too differently side to entire side and there are some that are only a trace better than the old design at f/2.8 and some that are hugely better with most maybe two-thirds of the way towards the better side (oddly the one that seemed the very worst at f/2.8 seemed to have the most even corner to corner to side to side placement of DOF, although it was honestly hard to tell for sure which lens was doing what it was meant to do in terms of where it put DOF)
anyway you can take it up with Fred and Invertalon from now as to whether or not they should have just kept their first copies or not, I\'ve said too much
May 03, 2013 at 04:00 PM
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