I'm looking for recommendations mainly for ND filters to use with Hasselbald HC lenses with a 95mm thread. I would like to get something that can stack a couple filters so I could maybe get a 1 stop and a 2 stop ND filter and then stack them for 3 stops or the like; or would like to know if that is strongly discouraged. I would have bought the singh-ray vari filer, but doesn't appear to come in that large a size.
Looking for opinions/suggestions on (1) what size to get, 4x4 or 4x6, (2) brand of filters and whether difference between resin and glass is worth the money (would assume you get what you pay for), and (3) recommended brand/model of holder.
Thanks,
Mike