Ah, doh! Should have mentioned. Since I'm using Sony and none of the lenses are that big, I was thinking a 77mm since I can use step-up rings -- this is the norm, correct? Thanks
I have a 77mm Lightcraft Workshop Fader ND Digi Pro-HD that I haven't used in a while. I upgraded to the 82mm filter size instead, and this has been just sitting here.