49mm filter rim is something quite unique to Pentax lens, mainly for primes. It's a bit hard to source for them. Other than b+w (cos I find them scratching too easily), do you have any other recommendations for high quality UV filters? Thanks.
Yeah man, my da21 is still filterless after half a year of searching. I did buy a 43mm b+w but somehow the rim was too thick and couldn't fit in.49mm is not very difficult to find.
I am using one B+W and one Heliopan.
The difficult one is the 43mm if you would like to use the original lens cap of DA21.
yeah... finally finish my exhausting 2 weeks in camp...
heliopan at ebay or from eugene if he has... other size i buy from ebay... much cheaper than local shops...
murami seems to be pretty good as well...