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Carl Zeiss Black Tessar Repair : glass clean & aperture blade clean / pixel valve /

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Pentacon 135mm f/2.8 Aperture Blades Repair

Carl Zeiss Jena Tessar 50mm f2.8 - 1955 vs 1978

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How to Shoot Manual in 10 Minutes - Beginner Photography Tutorial

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Olympus OM-System F.Zuiko Auto-S 50mm f1.8 Lens Disassembly

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Carl Zeiss Jena MC Pancolar 1,8 50 Reparatur Blende How To Repair Aperture Disassembly

Vintage Camera Repair - Ihagee EXA 500 - Slow Speed Shutter Timer & Tessar Lens