Hey, first time poster here...
I dont know if I should get the Hoya Ultra Thin HMC or the Super HMC pro1. They are both 3mm thick. I am using this on my new 17-40mm f/4 L lens.
Didnt seem to be able to find any information. This is my first big lens purchase and I spent months thinking if I wanted 10-22 or the 17-40mm, even though I only have a 350D, I decided to pop for the 17-40mm even with the 1.6 crop.
If there is another filter that I should be looking at, let me know.
I just dont want to get something too thick.