Hi everyone,

Some time ago I purchased a Xenotar 150mm 2.8 mounted in a Copal 3 shutter but it unfortunately is missing the caps. I know the thread diameter on the front element is 77mm, but I still don't know what Schneider cap I need to get to perfectly fit this (as the diameter is a bit wider on the outside) nor do I know which one I need for the rear element.

The caps seem to have some kind of reference on the inside. Anyone know which ones I need to get to fit my lens?

Many thanks in advance!