Category: Purchase Guide

Interpupillary distance (IPD) is the distance between the pupils of your eyes measured from center to center when your eyes are focused on infinity. IPD

What optic is being used? As far as stabilization goes, a well-made tripod, will hold any standard field binocular or spotting scope firmly in place

Twilight Factor is a number used to compare the effectiveness of binoculars or spotting scopes used in low light. The larger the twilight factor, the more

BINOCULARS, MONOCULARS, AND SPOTTING SCOPES SOLAR WARNING Never look directly at the Sun with the naked eye or with this optic. Permanent and irreversible eye

Compactness and ruggedness are two major features to consider when looking for a pair of binoculars. Compactness relates to whether roof, porro, or other prisms

Lens coating Lens coating is our most intuitive experience of telescopes. Which color, red, yellow, blue, and green, etc. Generally, there will be many layers

First, adjust the positive and negative diopter scales of the left and right eyepieces of the telescope to 0 scale. Hold the left and right

The central focus is also called the middle axis handwheel adjustment. From the picture above, you can see that she adjusts the focus through the middle

How to properly maintain and maintain the telescope in the process of using it? In general, as long as the method is right, the maintenance

Operation process of the astronomical telescope:If the telescope is equipped with an equatorial mount, the right ascension and declination axis balance of the telescope must

Refraction of astronomical telescope There are two types of prism materials, BAK4 and BAK7. These two materials have different refraction degrees. The refraction degree of