Kiev outer bayonet mount

MXP

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Is it possible to adjust the bayonet on the lens which uses the outer bayonet on a Kiev. I have a Jupiter-9 which has a bit of loose mount on the body. There are some "slack" when it is mounted. Are there any information on how to adjust the mount on the lens so I get a tighter fit?
 
Yes it is possible.

The bayonet on the lens has little "wings" that are supposed to be a little bent to hold tight on the body bayonet. If they are straight, you can gently bend them back a tiny bit. Even very little often helps.
 
Yes, the "wings" are split into a small wing and a larger wing. Is it the smaller wings you bend or both?
 
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