Repair of Pentacon Electric 50mm M42

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caila77

caila77

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I have an old Pentacon Electric 50mm f/1.8 lens that has a problem: the aperture blades only close when using the side button on the lens, but they do not close when pressing the pin on the back.

Someone with experience with this type of lens?
WhatsApp Image 2026-02-19 at 12.00.24 (1).jpeg
WhatsApp Image 2026-02-19 at 12.00.24.jpeg
 
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