I am looking for a 46mm filter to pop on my 20mm pancake. On my other lenses I have always used kenko (identical to hoya, just cheaper!) PRO 1D digital multi-coated filters but it seems that the smallest filter size that these come in is 49mm. I do like the extra-thin filters and found this on ebay, but I have never heard of JYC and am unsure of the quality. Looks like a hoya/kenko rip-off to me. Has anyone used them? Do the rest of you use a protective filter on your lenses? If so what do you go for and what would you recommend?