This unique focusing adjustment was a lot easier for a hunter to adjust and manipulate from their shooting position.Įvery Fecker rifle scope was focused individually while at the factory for many different ranges.

One of the most unique characteristics of the rifle scope created by Fecker was that is had a sliding erector lens that was used for distance focusing. Many advertisements appeared not long afterward saying that there would be fittings supplied so that people could use this scope in all contemporary mounts. It had a ¾ inch clear-aperture objective lens, was 18½ inches long, and had 6 and 10 power. In 1922, there was an ad in a rifle magazine that gave a brief description of his new rifle scope. The Fecker rifle scope is now mainly retired from use, except for a few people who continue to use vintage target rifles when they shoot. He designed the second largest astronomical telescope in the world during his time. Fecker was one of the best optical engineers of his time. Fecker and was a high-powered scope of really great quality that was intended to be used for competition, or long-range hunting. 01” or one line then any range up to 1000 yards is normally within the adjustment range of the scope.Anyone who has been in the hunting world knows what a Fecker rifle scope is. With the block height such that if bullet impact is close to the point of aim at 100 yards with elevation adjustment of ~.

2” which works out to about 100” at 100 yards with 7.2” scope block spacing. While the graduations go further, adjustment range of scope mounts is ~. Let “CD” = block center distance, and call the reticle movement per click “MOA”. Sometimes other center distances of the block flycuts or mounting points are desired or encountered.

Then the scope adjustments are called “quarter minute clicks”. This results in a movement of the scope reticle of one quarter of an inch at 100 yards, sometimes called a quarter of a minute of angle. Scope blocks are most frequently spaced such that the block flycuts or mounting points are 7.2” apart. There are two clicks per graduation, so a click =. The mounts have 25 graduations per revolution, so one graduation =. 025”, twenty-five thousandths of an inch. Thus, one turn or revolution of the adjustment knob =. This is based on my Lyman STS and Unertl scopes.Īdjustable scope mounts are threaded the same as a micrometer caliper, 40 threads per inch.

Unertl scope identification