I was in the process of getting my Beseler enlarger ready for 6x7 negs, when I noticed the enlarger won’t focus. The focusing knobs and the rod that connects them turn, but the height of the bellows does not change. I don’t think there’s a focusing lock, so I assume something is broken. Or does it need lubrication?
I should point out the enlarger worked fine last time I used it which was a few months ago.
Can someone provide tips on how to fix the enlarger?
I attached a pic of the parts I’m talking about.