Tag Archives: IV sb

My latest victims …

The Yashica-MAT EM had been sitting on my workbench for the past two years … finally got assembled today. It came to me in rough shape, the focus knob was almost falling off, the winder was stuck, the shutter was jammed, broken screws, etc.

The only thing I could not fix was a glitch in the winder release mechanism … sometimes after winding the crank it will not complete, so you have to press the shutter button again to engage the winder release. Also I could not get into the light meter because all the screws were jammed. I don’t think I will continue to restore it with new leatherette, as I have grown weary of it.

The Canon IV sb with lens, was rusting all over … and I took the chance on buying it on the hopes the lens did not have haze/fungus.

The Canon IV sb and the Canon Serenar 50mm f/1.8 were a lot easier to handle. The IV sb needed a cleaning and removal of the top plate. Rusted/seized screws prevented me from going further, so I could not check the shutter for leaks.

The lens was completely disassembled and cleaned. The lens did not end up with any haze or fungus … but I did discover some decementing of the rear elements starting to occur.


The family of Yashica TLRs and Canon Barnack type rangefinders are all very similar in design, so if you have worked with one model the rest are almost the same … including lenses and shutters.

Well, my fixer upping will be going to slow down for a bit as it is becoming economically more difficult to get cameras … I will keep hunting for BB (broken bargains.)

Canon rangefinder repair … note to self

Mental note of importance:

Do NOT remove the two black screws beside the winding knob if you are just going to clean out the rangefinder mechanics.

The top is made of two covers, so the screws on the lower plate do not need to be touched (six around the outside and the two black ones).

… unless you want to curse and swear … an then spend the next hour trying to re-attach the winding spool.

Another note;

When dealing with a dented circular metal piece that is threaded for a filter …

Get a wooden surface, a bamboo chopstick, and a light hammer.

Use the chopstick as a punch and lightly pound out the dented areas to form a circle again.