Hi,
I have a G690 with the 100mm f/3.5 lens on it, and I found out the filter size is 72mm by trying different lens caps in a camera shop. Anyway, I am interested in getting one of the 65mm lenses (and maybe even one of the 50mm lenses if one ever shows up on ebay), and I was wondering if the filter size on the 65mm lens is the same as the 100mm? I have checked several websites devoted to Fuji medium format, and none of the ones I've seen mention anything about the filter size. I don't even think the original G690 manual tells the filter sizes. It would be a nice touch if the filter size could be added to each lens description on this site.