Celestron Omni 40 mm Plossl Eyepiece - 1.25" - 93325 Planetary Imaging Cameras The USB port can connect

The USB port can connect to guide cameras

and it is tuned specifically to pass the H-beta wavelength band of light

Note:  The recommended PWM value is around 80

the less light it transmits

Celestron Omni 40 mm Plossl Eyepiece - 1.25" - 93325 Planetary Imaging Cameras The USB port can connectAbout the Celestron 40 mm Omni Plossl Eyepiece 1. 25" The Celestron Omni Plossl Eyepiece is a 4 element premium symmetrical Plossl optical design. Features include blackened lens edges to minimize internal reflection and maximize contrast, multi layer coating group on each lens surface to maximize light transmission and contrast, and each Omni goes through a two step anodizing process to prevent reflection from the top eyepiece barrel, unlike most