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Old November 24, 2019, 02:42 PM   #1
Bart B.
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Metallic Sights Lenses

Quote:
Originally Posted by old roper View Post
Bart, The match Regs I posted included Camp Perry Palma rifle 800,900,1000yd and that match you shoot.

I also found Palma rifle you can have lens.

Front Sight)—A lens and/or filter may be used in conjunction with the front and/or rear sight.(Rear Sight)— A corrective lens may be placed inside the rear sight hood on service rifles conforming to Rule 3.1. No part of the lens or method of installing the lens may protrude outside the rear sight hood.
What's the purpose of a corrective lens in the front and/or rear sight?

They're allowed most of the time with metallic sights on most rifle types. Details explained in the NRA Rule Books:

https://competitions.nra.org/competi...es/rule-books/

Last edited by Bart B.; November 24, 2019 at 02:48 PM.
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Old November 25, 2019, 12:05 AM   #2
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On the rear sight, Neil Jones was selling those to put older eyes focus on the front sight if you don't have shooting glasses for the purpose. I suppose it might speed sight acquisition in a practical match for which your shooting glasses might just have conventional distance correction. For iron sight long-range matches, I would anticipate the axis-adjustable shooting glasses being better (and a lot easier to clean).
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Old November 25, 2019, 09:00 AM   #3
Bart B.
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Its Bob Jones. I, too, sometimes get him confused with Neil Jones who makes reloading dies. Shot many matches with him.

http://www.bjonessights.com/

Those lenses help focus and sharpen target bullseye and front sight images in the eye. Sometimes slightly magnified so its easier to align them.

Focal lengths of those lenses is calculated by dividing 1 diopter (1 meter or about 40 inches) by the lens diopter value. A 0.50 (1/2) diopter lens has a 2 meter focal length, about 80 inches.

Last edited by Bart B.; November 25, 2019 at 09:11 AM.
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Old November 25, 2019, 02:45 PM   #4
old roper
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Bart, Lot of things being made for Palma rifle.

https://rilesmachine.com/products/

They do same thing in archery with aperture. You can get reticle on custom lens. Now I know what you shot that small group with scope vs your match rifle. 6 AM
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Old November 25, 2019, 04:45 PM   #5
Bart B.
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Reticles are not allowed in metallic sights with corrective lenses.
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Old November 25, 2019, 05:25 PM   #6
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Yep! Bob Jones. Thanks for the fix. I crossed them up for the funny reason that my Dad bought one of Bob's lenses for a match AR the same year I bought a tool of Neil's for primer pocket uniforming. Both purchases happened on Commercial Row.
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Old November 28, 2019, 03:29 PM   #7
Bart B.
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I've never noticed focus shifting between the target and the front sight.
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