A triple Barlow lens in a 1.25 "frame made of low dispersion glass (ED), minimizing the effects of chromatic aberration.

What are the benefits of using a Barlow lens?

The main advantage of using Barlow lenses is that they allow you to limit the number of glasses while providing a wide range of available magnifications. For example, having 2 eyepieces with 30 and 15 mm focal lengths, and using a 3x Barlow lens, we get two additional magnifications corresponding to eyepieces with 10 and 5 mm focal lengths. In addition, Barlow lenses do not change the offset of the exit pupil of the glasses ( eye relief ), they allow the focus to be extended further from the tube (when we have a problem with sharpening the image) and they allow to extend the focal length when taking photos of the sky at the focus of the lens by a factor of ¶Æ equal to the Barlow lens (2x, 2.5x, 3x, 5x).

Technical specifications

Warranty

2 years

HOW TO ATTACH A BARL LENS TO A TELESCOPE

Question : Can the element containing the optics of the same lens be unscrewed and screwed into any thread of the eyepiece with filter reduction, in order to magnify a little less?

Answer: There is no such possibility. The element with the lens can be unscrewed, but the housing thread is not a filter thread M28.5x0.6.