Canon LTM lenses similar? 50mm f1.8, 1.4, 1.5, 1.2

Hi Songetsu,
"These lenses develop haze on the inside rear elements"
Canon RF lenses in general or lenses who lost shims?
My son got as present very foggy Canon RF 1.8/50mm. After full inside cleaning, one of inside elements had very wobbly-univen surface. Didn't notice it before cleaning. Also it was impossible to clean haze 100%.
What happened there? Repair guy was well trusted and experienced.

if you dont clean them when they haze they can become etched not your repairer fault.

Xmas, I do not blame camera technician for anything. It's simple case where operation was success but "patient" died on the end. Plus my son doesn't mind to have a lens with unique signature. It must be interesting list of lubricants and other chemicals used in camera & lens manufacturing 50, 60 or more years ago?

gorbas said:

Hi Songetsu,
"These lenses develop haze on the inside rear elements"
Canon RF lenses in general or lenses who lost shims?
My son got as present very foggy Canon RF 1.8/50mm. After full inside cleaning, one of inside elements had very wobbly-univen surface. Didn't notice it before cleaning. Also it was impossible to clean haze 100%.
What happened there? Repair guy was well trusted and experienced.

Click to expand...

Any Canon LTM lens can develop haze, but the ones which suffer the most are those later ones with the aluminum bodies.

It sounds like your repairman did what some repairmen do, and tried to polish off the haze with a dremel tool and polishing wheel. Simple cleaning is easy to do, but hazing which has fogged the glass must be polished off with precision machinery. The cost for such a repair is about the same as simply buying a clean lens.