The barlow increases the magnification of any 2 inch or 1.25 inch eyepiece by two and a half times
Fully Multicoated Optics with 4-element lens system; hard-anodized aluminum barrel is threaded to accept 2 inch filters
2.5x Magnification with anodized Aluminum Housing; 2 inch Barrel Diameter; a 2 inch to 1.25 inch adapter is included; allows the use of both 2 inch and 1.25 inch eyepieces
A Classic: This is a premium eyepiece that provides better images than the eyepieces that come with new telescopes; The ingenious design uses only 5 lenses; yet provides a clear and bright image; making it an indispensable eyepiece for astronomers
52 Degree FOV: This 4mm 12.5mm eyepiece has a wider field of view of 52 degrees (46 degree for the 40mm) than most eyepieces allowing you to see more detail; you can choose a combination of eyepieces with the right focal length for your telescope
Description
2" Barlow inserts between the eyepiece and a 2" eyepiece holder on the telescope and increases the magnification by 2.5x. It can be used with 1.25" eyepiece and 2" eyepieces. The 4-element fully multicoated lens assembly offers superb field flatness and minimal chromatic aberration.