02-28-2011, 08:14 AM
I was not aware of the second effect - interesting. With global loss of contrast you mean that the whole image frame is affected evenly? If so, it is really hard to check because one would need a second lens to compare the contrast levels. Low contrast alone could just be a normal "feature" of the lens.
[quote name='Klaus' timestamp='1298732900' post='6380']
That's one potential effect - one or more elements are more or less centered (the center is where it should be) but tilted.
The other one is a more a global loss of contrast caused by an off-center (shifted) element and that's harder to check in shops.
[/quote]
[quote name='Klaus' timestamp='1298732900' post='6380']
That's one potential effect - one or more elements are more or less centered (the center is where it should be) but tilted.
The other one is a more a global loss of contrast caused by an off-center (shifted) element and that's harder to check in shops.
[/quote]