This sale is for a vintage 1988 black Celestron C90 telescope. The optical design is Maksutov-Cassegrain. This telescope has a 90mm (3.5”) aperture, f/11 speed, focal length of 1000mm and is capable of producing 55x and 33x with the included 18 and 30mm .965” diameter eyepieces. Also included is mounted 5x24mm finder scope. It has the original dust caps, a machined and removable dew cap.

Cosmetics are excellent. The tube focuses smoothly. Optics are very excellent for its age. MINIMAL dust and nothing else wrong. The secondary is quite clean; no part of this needs a dusting or any attention. With an eyepiece attached it is a spotting scope/telescope. With a photographic back attached it is a 1000mm f/11 telephoto lens. (You will need a T-mount, one which fits whichever camera you will be using.)

Accessories include:

TRIPOD NOT INCLUDED

1 x Celestron Dew Shield

1 x .965” dia. Celestron Star Diagonal

1 x .965” dia. Celestron Porro Prism

1 x .965” dia. Celestron 18mm Kellner Eyepiece

1 x .965” dia. Celestron 30mm Kellner Eyepiece

1 x .965” to 1.25” Eyepiece Adapter

1 x Celestron T-Adapter for photography

1 x Dovetail Adapter for use w/astronomical mount

This little C90s will take you to the Moon, Jupiter, Venus, sometimes Mars, definitely Saturn, back to the Moon, and the very brightest deep sky objects. It is also perfect for spotting and birding and with the T-adapter, you can use it as a long telephoto lens. It is all contained in a Celestron Hardcase.