Explore Scientific 100° Argon filled Eyepiece - 5.5mm (2") Refreactor as it has a slip

as it has a slip clutch

Aurora Borealis is commonly visible in the northern artic skies as radiation from the Sun hits our atmosphere and creates a magical plasma effect

If you install the OAG-L in your optical beam path

simply slide your finger over the star chart for convenient operation of the mount

doubles the focal length for visual observations or planetary photography

Explore Scientific 100° Argon filled Eyepiece - 5.5mm (2") Refreactor as it has a slipThese 100 eyepieces from Explore Scientific offer a truly unique combination of excellent contrast and edge sharpness, even with fast optics and a huge field of view. In fact with such a wide field of view, you can sometimes forget that you are looking through a telescope as you gaze over the enormous, seemingly unlimited expanse of space. Due to the perfect combination of a wide variety of modern glass materials, these eyepieces from Explore