Originally posted by Kootenay Image Is there any advantage to using a Sigma Ex DG UV Filter on a Pentax SMC Da* 300 mm F4 ED (IF) SDM Lens.
Will the Hoya UV (0) be adequate considering the quality of the lens?
I use a Sigma EX DG filter with my Sigma 105 macro and it is very good, but on a WR lens I wouldn't use any type of filter on a permanent basis.
If you want to get a Hoya filter, make sure you buy a top notch one because their older HMC coatings were easy to scratch. I think they have a new line of Super-something coated filters, but I switched to B+W and never tried something else. B+W are good but even they might not have coatings to match the DA* in terms of repelling dust, fingerprints, and water. Again, I wouldn't use a filter with the DA* - just use the hood at all times.