M1 Garand Elevation - Page 2

Bart B. · September 19, 2014, 02:52 PM

No human eye automatically centers a front sight image in a rear sight aperture image on the eye's retina. The rifle or the aiming eye has to be intentionally moved by the shooter to do that. Eye lens muscles only change its focal length, not the directions of two sets of light rays with one from each sight in different amounts, into an image of each on the retina and perfectly aligned. Physically impossible.

That old myth's been around for over a century.

September 19, 2014, 02:52 PM	#26
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	No human eye automatically centers a front sight image in a rear sight aperture image on the eye's retina. The rifle or the aiming eye has to be intentionally moved by the shooter to do that. Eye lens muscles only change its focal length, not the directions of two sets of light rays with one from each sight in different amounts, into an image of each on the retina and perfectly aligned. Physically impossible. That old myth's been around for over a century. Last edited by Bart B.; September 19, 2014 at 04:04 PM.