This 1.25" 2x achromatic Barlow lens can be used visually, but the eyepiece holder portion also has integral T-threads so it can be used as a T-adapter for lunar and terrestrial photography. The physically short Barlow fits into the rack and pinion focuser drawtube of most equatorial refractors and reflectors. It can also be used in the 1.25" visual back or eyepiece holder of most Schmidt-Cassegrain or Maksutov-Cassegrain telescopes.
Photographically, the Barlow doubles the effective focal length and focal ratio of the telescope and acts as a transfer lens to project a two times enlarged image onto the film plane of your camera for close-up lunar and terrestrial photography. It can also be used with many reflectors and refactors. Some vignetting may be visible with very short focal length telescopes. Needs optional T-ring for photographic use.
- 2X Barlow Lens is to double the magnification of every 1.25” eyepiece you own
- Use the T-Adapter portion of this accessory to transform your telescope into a giant telephoto lens