Hi there! I have searched far and wide for lens specs to purchase a UV Filter and lens caps for this lens and cannot seem to find the right diameter. Ordered a 58mm UV filter per Schneider specs & it is too small. Any idea on lens diameters so I can purchase caps for the rear & front elements? Any help would be greatly appreciated!!! Thank you.

Previously, I used this: https://www.schneideroptics.com/info...5,6-180mm.html

It's possible I'm just missing something here...been a while since I ventured into Large Format land.