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Hasselblad Prontor CF F2.8 80mm - What is the green button and green F for? The button seems to lock the shutter on F or off of F. What is this function? :
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Copal Compur Prontor #3 Shutter Retaining Ring For Schneider Fujinon R – eTone - Professional Photo Accessories
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Copal Compur Prontor #3 Shutter Retaining Ring For Schneider Fujinon R – eTone - Professional Photo Accessories
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