ND filter for flash

[tclune]

I am considering getting an ND filter for use with fill flash outside (my camera doesn't support HSS). I am looking for input on a couple of things:

1. What density should I get for this kind of work? I am leaning toward 0.9, but that is really not based on anything solid. Would a variable ND filter make sense here? Could I get away with the Hoya, which is about the only one I've seen from a manufacturer that I recognize that is still affordable. I would not expect to be stressing the filter by maxing it out, so I would hope that the color bias and patterning wouldn't be an issue, but I just don't know. I also haven't been able to find out if it is multicoated or not.

2. If I need to get a fixed density filter, are there particular brands and models that are best? I haven't seen any round-ups of ND filters like the LensTip round-up on CPLs. If you know of such reviews, I would appreciate a link. If you have a favorite, that is also welcome. TIA

[Ozzie_Traveller]

G'day TC

see your 2nd posting for my full answer
phil