4th March 2005, 12:36 AM
4th March 2005, 12:45 AM
Welcome to CS
Firstly what are you testing for?
So after testing and the results are not up to par,
what do you do with the lens?
Just read the reviews and leave the testing to the experts.
Just shoot it!
4th March 2005, 08:15 AM
cheack the af motor? Check if it can go from min to inifity smooth and back
4th March 2005, 06:03 PM
open up the aperture to maxmum and look thru the back for FFD...
4th March 2005, 06:06 PM
check for fungus, infinity focus, AF, loose parts, strange sounds, cosmetic wear, version(mark1? mark2?), filter size, hood, case, box, age, warranty, ..
4th March 2005, 06:47 PM
Ok, what about the sweet spot? I know some lens got sweet spot right? I hv the 70-200F4 L, SP 90 DI and 28-135 IS USM. Any idea what are the sweet spot for these lens? Thanks for all the replies.
4th March 2005, 07:54 PM
The sweet spots for all glasses are mostly the center of the elements, thus at about f/8, most glasses performs it's best, thus the term 'sweet spot'.