StellaLyra 2 Inch 4-element Photo-Visual Coma Corrector for Newtonian Telescopes

Product Description

A high-quality 2 inch 4-element Photo-Visual Coma Corrector Designed and manufactured by Guan Sheng Optical (GSO) in Taiwan.

Reduces coma and field curvature both visually and for imaging, designed for fast Newtonian telescopes with focal ratios f/3-f/6 but optimised for around f/4.

This modular design includes a 2" eyepiece holder with two large thumbscrews and a non-marring brass compression ring (won't mark your eyepiece barrels).

For astrophotography, the eyepiece holder can be removed to reveal an M48 thread for connecting a camera and includes an M48-M42/T2 adapter.

Increases magnification slightly (approximately 1.1x) and has a back focus requirement of approx 75mm. So, for example, when using a Canon/Nikon DSLR camera with 55mm back focus (including a standard thickness M48 ring to fit the camera), you will need an approx 20mm long spacer between the corrector and M48 ring.

Features
Smooth 2" nosepiece with M48x0.75 / 2" filter thread
Designed for f/4 Newtonian Telescopes but works well around f/3-f/6
Fully multi-coated 4-element, 2-group optics
Reduced coma and field curvature
1.1x Magnification
75mm ± 5mm back focus
44mm clear aperture
Includes an M48 to M42/T2 Adapter
Undo the 2" eyepiece holder to reveal an M48 thread

Included in the box
2" Coma Corrector
M48 to M42/T2 Adapter
Lens Caps