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Old 19-06-2015, 08:24 AM
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LewisM
Novichok test rabbit

LewisM is offline
 
Join Date: Aug 2012
Location: Somewhere in the cosmos...
Posts: 10,389
Just to help out, you focus these finders by loosening the objective locking ring (the knurled ring ) and focus by screwing the objective cell in or out, and then relocking it with the knurled ring.

All focusing at the "eyepiece" end does is focus the eye to the crosshairs.