What kind of filter?

[Gidders]

Originally Posted by mahsleb

Thanks everyone for your help and advice

But what a bewildering choice there is!
Does anyone have any experience using this filter?
Hoya Pro-1 Super HMC (UV or Skylight) £55 at Jessops
but only £20 ish from Digitalrev (Tempting, but I'm wary
of buying from HongKong)

or suggest a better buy? or make?

Cheers
Tony

Digital Rev are a good company and you can buy from them with confidence

[Joe]

By the very nature of UV light, fitting a UV filter to cut it out can lead to very slight warm results....so many variables, e.g what altitude and conditions you're shooting in.
Admittedly, the appearance of UV filters and Sky 1B verse Sky 1A is less warm.

Good point about image degredation. even some 'drop-in' filters designed specifically for some long toms also affect quality, as found with my 300mm 2.8
However, I fitted a cheap filter to my 180mm 2.5....and the difference between it and the B&W one fitted now is marked!...
Yes, spend money on nice quality filters if you're going to use them