2x achromatic Barlow Lens (31.7mm/1.25in fitting)

This Barlow lens is fully multicoated for superb image quality and contrast. It contains two lenses and therefore produces high quality images without additional false colour. The body is of all-metal construction.

In addition; the lense's large diameter facilitates the use long focal length eyepieces; without vignetting problems.

Barlow lenses are used to enhance the magnification of any given eyepiece. The Astronomica 2x Barlow lens enhances the magnification 2-fold.

One example: You have a telescope with a focal length of 1200mm. Your shortest focal length eyepiece has a focal length of 10mm. This produces a magnification of 120x.  With the addition of this Barlow lens; the magnification will then be boosted to 240x.