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| p.1 #9 · Filter for Canon EF 100mm f/2.8L Macro IS USM Lens |
I don't use filters on my 100L. I usually have a ringflash on the lens when shooting macro, and that gives more separation from subject.
That being said, I was shooting fungi after rain last weekend, and discovered that all of my shots had the same small brown spots on them in the same places, which magically disappeared after I cleaned the front element. Hmmm, mud splashes . . . perhaps that "protective" filter may get some use after all when I am next out in the wet . . .