2" 40mm Eyepiece Barrel Extension Recommended Technical Data

Technical Data

and its annoying presence at the outskirts of an image can be a bane for astronomers of all levels

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I am named after the Roman God of War because my red color is reminiscent of blood

Optical performance for huge sensors with diagonals of up to 52mm wide is still excellent

2" 40mm Eyepiece Barrel Extension Recommended Technical DataExtension focal length: 40mm. Total length: 70mm. Extension tube provides extra focuser "back travel" often needed for short range terrestrial viewing through a telescope, or for astrophotographic applications Fits in 2" telescope focusers, and accepts 2" eyepieces or accessories. Threaded for use with standard 2 Inch astrophotography filters Features a locking thumbscrew to secure any inserted astronomy accessory, with a brass compression ring to