I have a question regarding the use of a UV filter on a macro lens.
Who uses them? Has anybody experienced any softness that they can attribute to a typical Tiffon UV filter?
I shoot a Sigma 105mm F2.8 macro lens. It could be due to auto-focus (I know.. shouldn't use auto-focus in the macro world) but I tend to see a softness in the focus/sharpness of the images that I get with this lens. Its not 100% of the time, but enough that I'm considering letting someone else try it and see if they get the same results.
Lets hear your opinions..