Barlow GSO 2x lens in 1.25 inch frame - two-element, achromatic optics fully covered with anti-reflective layers ensuring excellent color correction and good optical performance. Good blackening of the lens sleeve virtually eliminates glare.
In addition, the Barlow lens allows you to use it as a 1.5x Barlow and a photographic adapter, according to variants below.
Option I - 2x Barlow lens
The use of a complete lens allows you to increase the magnification of the used eyepiece by a factor of 2. For example, a 30mm eyepiece with a Barlow lens will function as a 15mm eyepiece.
Option II - 1.5x Barlow lens
The optical element of the Barlow lens placed in a metal frame can be unscrewed from the sleeve and screwed into the eyepiece filter thread, making it compatible with almost all 1.25 "eyepieces. By installing it in the eyepiece using the eyepiece filter thread, we obtain a system that allows for 1.5 times the magnification of the eyepiece used For example, an eyepiece with a focal length of 30 mm together with the optical element of a Barlow lens will function as an eyepiece with a focal length of 20 mm.
Option III - 36 mm eyepiece connector
The lens barrel without the optical element can be used as a 36 mm long eyepiece adapter straight in relation to the 1.25 inch eyepiece extractor.
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 two eyepieces with 30 and 15 mm focal lengths, and using a 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 ), allow the focus to be extended further from the tube (when we have a problem with sharpening the image) and allow to double the focal length when taking pictures of the sky in the focus of the lens.
| • times:|| 2x (optional 1.5x, see above)|
| • construction:|| achromatic|
| • barrel standard:|| 1.25 inch|
| • anti-reflective layers:|| FMC|
| • weight:|| 65 g|
HOW TO ATTACH A BARL LENS TO A TELESCOPE