Can this filter work for nikon 18-200 zoom?
According to Nikon it takes a 72mm filter, so it should fit - searched on Nikon's home site, but Adorama won't let me enter the url. Just go there and enter the lens and see what it says.
I have no idea if it's the best choice - I got it for a Rokinon - same people as Vivitar - so I figured it would match well. Being a big filter, they get expensive. Certainly seems to work ok.
I regard Uv filters as being there for protection, not optics, although I sure I could get an argument on that. I suppose it might be worth testing different ones on 52mm lens because they cost so much less than the big filers. Good luck!