5-25x50 SFIR SFIR Shooting Rifle Scopes

The term "5-25x50 SFIR SFIR" refers to a type of rifle scope commonly used for shooting and long-range precision. Let's break down the components of this designation:

Magnification: "5-25x" indicates the variable magnification range of the scope. In this case, it means the scope can be adjusted between 5x and 25x magnification. This range allows for a wide field of view at lower magnifications and the ability to zoom in for precise targeting at longer distances.

Objective Lens Diameter: "50" represents the diameter of the objective lens in millimeters. The objective lens is the one at the front of the scope and determines how much light the scope can gather. A larger objective lens diameter generally results in a brighter image, especially in low-light conditions.

SFIR: The acronym "SFIR" stands for Side Focus/Parallax Adjustment and Illuminated Reticle. It indicates that the scope has a side focus/parallax adjustment feature, allowing you to compensate for parallax error and achieve a clear and focused image at different distances. Additionally, it implies that the scope has an illuminated reticle, which can help with aiming in low-light conditions or against dark backgrounds.

In summary, a "5-25x50 SFIR SFIR" scope is a variable magnification scope with a range of 5x to 25x, a 50mm objective lens for good light transmission, and features such as side focus/parallax adjustment and an illuminated reticle. It is commonly used for long-range shooting and provides versatility and clarity in various lighting situations.