I need a 67mm filter for a 17-85mm Canon. I have looked at all the normal places B&H,AD, ect. I really don't know what I need for general purpose nor can I find the answer by a site search.
There is a Hoya 67mm HMC 82A for sale on site. Checking it out I find 82A is a color converter filter. Now I'm really confused!! I can't find a clear explanation of a color converter.
HELP, newbie wwwould be lost if he wasn't so confused.