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Sticky shutter in Hasselblad Planar 1:2.8 f=80mm

This old Hasselblad Planar 1:2.8 f=80mm had a very sticky shutter, so if set on 1 sec. it would take way too long before the shutter clicks. It's not that hard to open the lens, I use a rubber tool..., actually it's a rubber plumbing fitting and the diameter is ~54mm it's very sticky so it's easy to unscrew the front lens. You can buy those fitting in many hardware stores, just like "Bauhause". Some brand's are: "Marley" and "Vawin" rubber plumbing fitting. I clean the slow gear in Isopropylalcohol 99%, and lube ONLY the axle ends with very thin sewing machine oil.