July 18th, 2015

SFC Keith Sanderson Wins 2015 NRA Pistol Championships

SFC Keith Sanderson NRA Pistol Championships

Report by Kyle Jillson from NRABlog.com.
SFC Keith Sanderson NRA Pistol ChampionshipsSergeant First Class (SFC) Keith Sanderson of the U.S. Army Reserve has been crowned the 2015 NRA National Pistol Champion. After six wet days at Camp Perry along the shores of Lake Erie, Sanderson unseated defending champion Brian Zins by 14 points – 2655 to 2641.

Sanderson, who served eight years in the Marine Corps and eight years in the U.S. Army, is a renowned sport shooter who holds an Olympic record and won an unprecedented three medals (gold, silver, and bronze) in three World Cups in 2009.

Wet Conditions at Camp Perry this Year
At Camp Perry, you can always expect a little rain to come off the lake, but the midwest is experiencing torrential storms this summer and parts of the range – especially along the firing line – became flooded ponds. This year some shooters even stuck “No Wake” signs in the larger puddles to keep attitudes light despite the muddy situation.

Some competitors wore rubber boots to help navigate the puddles.
SFC Keith Sanderson NRA Pistol Championships

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July 18th, 2015

Swarovski Tech Blog Reveals How Scopes Work

The Swarovski Optik website features a blog with interesting technical articles. In the “On Target” series of blog stories, Swarovski has provided a handy explanation of how optics systems work, with exploded diagrams of rifle scopes, spotting scopes, and binoculars. CLICK HERE for Swarovski Optics Blog.

Accurateshooter.com optics rifle scope Swarovski


Accurateshooter.com optics rifle scope Swarovski

Scope Terminology
Focusing Lens
The focusing lens is an adjustable lens inside the optical system for focusing the image at different distances…. In the case of rifle scopes, apart from focusing, the focusing lens also facilitates parallax compensation.

Diopter Adjustment
For rifle scopes, the reticle can be focused using the diopter adjustment on the eyepiece, thereby correcting any visual impairment. [Editor’s Note: Movable eyepiece diopter adjustment is not offered on all rifle scopes. It is a useful feature on Swarovski and other premium scopes. This allows shooters who need eyeglasses to get a sharply focus image even without wearing corrective lenses. Of course shooters should always wear ANSI-certified eye protection. With the diopter, folks who need correction can use inexpensive, non-Rx safety eyewear instead of expensive prescription safety glasses.]

Reversal System
The purpose of the reversal system is to reverse the image by means of prisms in binoculars and telescopes, and lenses in rifle scopes….The lens reversal system is needed in rifle scopes to control the variable magnification and move the exit pupil[.]

Resource tip by EdLongRange. We welcome reader submissions.
Permalink Optics, Tech Tip 3 Comments »