Canon 85 1.8 RF LTM (8x 100kb) - collimating and RF matching

In case someone stumbles onto this in the future, all of the Serenar lenses I've worked on have the serial number scribed on most internal pieces to make sure they were all assembled from the same parts. These scribed numbers can get very faint in the passage of time.
 
I also have the 85/1.8

My copy is very good except the inner surface of the front element has some light splotches which can only be seen with optical light. I'd like to try cleaning this surface.

What is the simplest way to get to the interior of the front element? I note the front ring has knotches to accept spanner.

My 100/3.5 and 135 LTMs the optical cell simply unscrews. This one however to not seem to want to unscrew. Is there a set screw?

What do we recomend to clean the lens surface? I usually use rubbing alcohol.
TY so much for advice
Charlie
 
You must log in or register to reply here.
Back
Top Bottom