An instrument that provides a great picture of faraway subjects is a spotting scope. Although it has the same concept and mechanism as a conventional telescope, there are also some differences. Generally, its objective lens measures from a low of 50mm to a high of 80mm and magnification power ranges from 15x to 60x. But there are also specialized premium scopes which have bigger objective lenses, sometimes reaching 90mm in size.

In Leica spotting scopes, coating is very important. This can make the scope more durable and aid in its performance. The coating can help in better image production by minimizing the reflection of light. The characteristic of the spotting scope often dictates the type of coating to be used. ED glass is used in making a high quality rifle scope because of its anti-chromatic aberration properties. A coating can be applied on the lenses or on the whole exterior of the scope and can have a single layer or multi-layer application.

The measure of the light ray that goes out of the spotting scope lens is called the exit pupil. A sharper and more brilliant image can be obtained with a larger exit pupil. By dividing the objective lens’ diameter by the lens intensity, you can find the exit pupil.

The largest possible gap (without restricting the field of view) between the eye and the spotting scope is called the eye relief. It is important to have a large eye relief as possible to minimize eye strain especially in extended use.

When you look through a spotting scope, the complete stretch of image that you’ are able to see is referred to as the field of view. Speedy targets require a broad view but situations that call for a higher magnification necessitate a narrower view.

Typically, the representation of the spotting scope’s power appears as three numbers mediated by the letter X (e.g. 3x9x40mm). The magnification intensity of a variable spotting scope is identified by the first two numbers.

The objective lens’ size is what the third number portrays. Crisper and more brilliant images are allowed by a large objective lens. This is due to the fact that more light is transmitted if and when the objective lens is larger.

To maximize the efficacy of a spotting scope, you might want to get a steady and sturdy tripod. But you have to be sure that your tripod is stable and does not obstruct your view.

As in any other product, quality has a price that’s why it’s not advisable to purchase cheap ones that compromise quality.