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Optical centering

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/17/2009 at 13:47
blkexp98 View Drop Down
Optics GrassHopper
Optics GrassHopper

Joined: July/16/2006
Location: United States
Status: Offline
Points: 12
Can anyone provide a process to optically center a scope?  I want to centera couple scopes ive mounted and removed over the yars and want to take them back to zero for lack of a better term.  I know i can do a mechanical center but i really would prefer a optical since thats what really matters.  Some of my scopes are cheap so i have my doubts that halfway is really centered. 
I think i remember someone saying you could somehow use a mirror and sit the front objective on that but i just dont see how that could work. 
Thanks for any help. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/17/2009 at 14:58
Roy Finn View Drop Down
Steiner Junkie

Joined: April/05/2004
Location: United States
Status: Offline
Points: 4856
Hold the scope (objective end) flat up against a mirror and look into the ocular lens. You will see two reticle images. Use the windage and elevation adjustments to line up the two visible images so that they appear to be one.

Edited by Roy Finn - September/17/2009 at 15:00
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/17/2009 at 15:04
Trays 7940 View Drop Down
Optics Master
Optics Master

Joined: August/09/2009
Location: Texas
Status: Offline
Points: 1149
cut 2 V's of the same height, accross from each other, in a narrow cardboard box so it will hold your scope.  place the box and scope on a flat surface, with the scope sitting in the 2 v's.  Aim the cross hairs at a spot 25 to 50 yards away.  starting with the elevation knob on top, dont move your box, rotate your scope while watching the xhairs.  The xhairs will move in an elongated circle, oval, as you rotate the scope.  Adjust the elevation or windage to reduce the elongated circle into a small circle. This is trial and error so you may have to go through the process a few times.   Bandito
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