I was recently given a few Pentax 67 lenses. Among them is the older 55/3.5. This thing is massive and from what I have read online it takes 100mm filters. Any one have these?
Just to throw in here, the lens does take some pentax bayonet filters but supposedly theyre quite hard to find. I was quite lucky to get a orange filter and UV filter when I bought mine. OFC with these being so hard to find perhaps a screw filter is your best bet