Metallic Sights Lenses

Bart B. · November 24, 2019, 02:42 PM

Quote:

Originally Posted by old roper

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/

**Unclenick** · November 25, 2019, 12:05 AM

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).

Bart B. · November 25, 2019, 09:00 AM

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.

old roper · November 25, 2019, 02:45 PM

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

Bart B. · November 25, 2019, 04:45 PM

Reticles are not allowed in metallic sights with corrective lenses.

**Unclenick** · November 25, 2019, 05:25 PM

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.

Bart B. · November 28, 2019, 03:29 PM

I've never noticed focus shifting between the target and the front sight.

November 25, 2019, 12:05 AM	#2
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,061	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). __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle

November 25, 2019, 09:00 AM	#3
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	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.

November 25, 2019, 02:45 PM	#4
old roper Senior Member Join Date: June 11, 2007 Posts: 2,155	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 __________________ Semper Fi Vietnam 1965 VFW Life member NRA Life Member

November 25, 2019, 05:25 PM	#6
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,061	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. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle

November 25, 2019, 04:45 PM	#5
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	Reticles are not allowed in metallic sights with corrective lenses.

November 28, 2019, 03:29 PM	#7
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	I've never noticed focus shifting between the target and the front sight.