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Chinon 300mm f5.6 - stuck aperture blades
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PostPosted: Wed Oct 17, 2018 4:22 pm    Post subject: Chinon 300mm f5.6 - stuck aperture blades Reply with quote

I have a Chinon 300mm f5.6 (looks like a very early Tamron with tapered body) with M42 mount on it's way to me with the aperture blades stuck wide open. I am assuming it is because of oil ingress. Are the blades easy to access? Is it just a matter of removing the four mount screws?