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Thread: Peep sight aperture double vision?

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ChrisATX Peep sight aperture double... 02-12-2014, 07:48 PM
mtoms You know alcohol and guns... 02-12-2014, 10:58 PM
emmagee1917 I have not heard of this... 02-13-2014, 11:36 AM
Badger I'm 65 and I had a similar... 02-13-2014, 11:41 AM
Allen Humphrey Kind of odd. Try covering... 02-13-2014, 01:39 PM
JGaynor The "ghost" image usually... 02-13-2014, 05:17 PM
Patrick Chadwick Lucky you! If I want to see a... 02-13-2014, 05:21 PM
ChrisATX Btw I had no trouble with... 02-13-2014, 06:38 PM
Fred G. I have the same problem if I... 02-15-2014, 11:38 PM
  1. #7
    Advisory Panel Patrick Chadwick's Avatar
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    Quote Originally Posted by ChrisATX View Post
    I notice that my front blade is crystal clear

    Lucky you! If I want to see a front blade crystal clear, I have to reduce the aperture to such a small size that other optical effects occur. And that is a clue to a possible cause: are you using a very small peephole? As a rough guide, 1/16" is small enough, below that wierd things may happen, depending on lighting conditions. I see spiderwebs, you see double... with my Luger I see 3 foresight blades (a shadow blade left and right, looks like a mountain range!)... it depends a bit on your personal eye geometry... so open up the aperture, and if the effect disappears, note the minimum size that does not produce the aberration. This is light-dependent - in dimmer light the hole must be enlarged.

    Second test: When you get the double-hole effect, try moving your eye up and down relative to the peephole. If the doubling can be made to disappear in this manner, then you first need a real eye-doctor to make sure that the aberration is not a symptom of something serious, as already recommended, and (assuming an all-clear from the doc) an optometrist who understands what you need as a shooter. And that means spending some time getting it right. You will have problems if you simply march in to the opticians with a rifle - what I did was to take along a meter rule with the backsight aperture and foresight taped on at the correct distance.

    You are likely to need shooting glasses with a lens specifically adjusted to suit the distances of the foresight/backsight from the eye. And accordingly a second lens if you also shoot handguns, because of the different focussing distance. But in the end, the lenses are cheaper than wasting a lot of ammo and range time.
    Last edited by Patrick Chadwick; 02-13-2014 at 05:31 PM.

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