Glossary
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SUM Mounting Solution on Sauer 303
Let’s begin with the introduction of the J. P. Sauer and Sohn company, the oldest still-operating firearm manufacturer in Germany.…
The Purpose of the Erector Tube and the…
Introduction All the contemporary riflescopes are equipped with an elevation turret and a windage turret. The former is used for…
Picatinny rail – Aluminium or Steel
What is a Picatinny Rail? Let´s refresh our memory of what a Picatinny rail is. It is a mounting rail,…
Screw Tightening Torque Values in Riflescope Mounting
Proper mounting of optics is one of the key factors that affect its precision and reliability. Each component, from the…
Rayleigh and Dawes resolution
Resolving power (or resolution) of an optical telescope is the ability to see small details in the image. It is…
Barlow lens
Magnification of telescopes is calculated by dividing the objective focal length with the eyepiece focal length. To change the magnification,…
Aperture, focal length and focal ratio
Aperture One of the essential features of a telescope is its aperture. Depending on the type of telescope, the aperture…
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