If you observe for extended periods you may find that you will get eye fatigue or eye strain as you have to keep one eye closed. One option here is to use an eye patch to make you look like a modern day astro-pirate (!) so you can keep both eyes open, but the eye behind the patch just “sees darkness”. The other option is to use a binocular viewer. Using such an optical accessory can help improve views of the Moon, planets as well as deep sky objects as well as reduce eye fatigue.
The Celestron Stereo Binocular Viewer will work with their SCT or EdgeHD telescopes as well as with other telescopes that can accommodate the ~89mm/3.5″ of back focus that these take up. The BaK-4 prisms are multi-coated for increased light transmission and have an aperture of 22mm. The binoviewers feature individual focussing mechanisms with dioptre markings on each barrel. The exterior body is rubber coated for protection and for easy handling even when wearing gloves. An aluminium padded case is included for safe storage or when they are being transported.
Two user-supplied eyepieces are of course needed for use with binoviewers (not included) and we recommend purchasing the two eyepieces at the same time. This is because changes in production of the eyepiece exterior housing can happen which can make the eyepieces being slightly different in length or diameter which may cause an issue with eye/face placement when you are looking through the eyepieces.
The Celestron Stereo Binocular Viewer is currently in stock.