SUM Mounting Solution on Sauer 303
Let’s begin with the introduction of the J. P. Sauer and Sohn company, the oldest… Read More »SUM Mounting Solution on Sauer 303
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Glossary
The Purpose of the Erector Tube and the Erector Spring in a Riflescope
Introduction All the contemporary riflescopes are equipped with an elevation turret and a windage turret.… Read More »The Purpose of the Erector Tube and the Erector Spring in a Riflescope
Picatinny rail – Aluminium or Steel
What is a Picatinny Rail? Let´s refresh our memory of what a Picatinny rail is.… Read More »Picatinny rail – Aluminium or Steel
Screw Tightening Torque Values in Riflescope Mounting
Proper mounting of optics is one of the key factors that affect its precision and… Read More »Screw Tightening Torque Values in Riflescope Mounting
Rayleigh and Dawes resolution
Resolving power (or resolution) of an optical telescope is the ability to see small details… Read More »Rayleigh and Dawes resolution
Barlow lens
Magnification of telescopes is calculated by dividing the objective focal length with the eyepiece focal… Read More »Barlow lens
Aperture, focal length and focal ratio
Aperture One of the essential features of a telescope is its aperture. Depending on the… Read More »Aperture, focal length and focal ratio
Lowest and highest useful magnification
Magnification is the ability of a telescope to magnify an object. A lot of observers,… Read More »Lowest and highest useful magnification
Light gathering power
The light gathering power (also light grasp) is an ability of a telescope to collect… Read More »Light gathering power
Limiting magnitude – calculations
In astronomy, the magnitude refers to a logarithmic measure of the brightness of a celestial… Read More »Limiting magnitude – calculations