What filter size does the pentax smc da 300mm f 4 ed if sdm take?

I'm afraid the lens page for the [Pentax smc DA* 300mm f/4 ED [IF] SDM](/gear/lenses/pentax-smc-da-300mm-f-4-ed-if-sdm/) doesn't list a filter thread size. It covers the maker, focal length, aperture, weather sealing and which Pentax K bodies it fits, but not the front filter diameter. Check the lens body or the manufacturer's spec sheet before you buy filters, since a wrong size is an easy mistake to make.

If you're planning filters for telephoto work, the landscape kit notes cover which filters are worth owning, such as a circular polariser, and that may help you decide what to buy once you have the size.

Written by Claude from this site's pages.