Carl Zeiss Jena 50mm f/2.8 strip down and clean

I received another camera and lens combination a couple of days ago – a Praktica LB fitted with a Carl Zeiss Jena 50mm f/2.8 zebra lens. When I received it the focus ring was completely locked and the aperture wouldn’t close so this seemed to be another ideal candidate for a ‘strip down and clean’ post. It turned out this was a considerably more complex problem than the last lens I took apart and cleaned although I’m pretty sure that it’s […]

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