GSO 2" Coma Corrector for Newtonian telescopes

Description

3-piece modular design:Optics in 2" nosepiece with 48mm male thread . 2' eyepiece barrel that attaches to optical nosepiece, and  M48 - M42 adapter ring
Design optimized for work well from f/3 - f/6
Reduce coma and field curvature
Designed for visual and photographic use
Optics (4 elements / 2 lens groups) with a clear aperture of 43.9mm
Back-focus spacing requirement is approx. 75mm from the shoulder of the 2" nosepiece to the image plane
For visual use, connect the 2" eyepiece barrel to the main optical nosepiece
1.warranty period 120day
2.package included:1pc
On Aug-06-19 at 01:48:04 PDT, seller added the following information: