I have the 7d
100-400L 77mm Ring
11-16mm Tokina 77mm Ring
50mm 1.2 L with 74 ring
I want to buy a 82mm Heliopan Vari ND. The idea is that I one day may buy the 16-35 L which is a 82mm ring. Maybe I dont and keep my 7d and continue with the 7d. I assume one day I will buy a Full Format. I am really worried to go crazy with 82mm is that a mistake to plan so far ahead? I just can never buy another filter this expensive...
So I think I am going to go with the 82mm even though I have (2) 77mm and corrected (1) 72mm filter size. I could decide on the 35 prime and just keep my 7d (avoiding the 16-35mm). The thing that I was not being clear on is my need for video (photo interest 1st still) and getting my shutter at 50fps during bright daylight. I should say that my worry and big question is will stepping down to 77mm or 72mm impact the image and make it silly to consider. Maybe its to bulky, causes blur, or is just to far to get to 72 on my best prime lens. If the 82mm with step down to 72mm is trivial and not an issue for the image I would be very happy. That is what I would like to hear. Thank you guys for your responses!