Optical reference

Celestron NexStar 6SE: aperture, focal length and eyepiece fit

What the Celestron NexStar 6SE measures, the magnification and true field each eyepiece produces in it, and the barrel, mount payload and camera adapter that fit.

Published specifications

Aperture
150 mm (5.91 in)
Focal length
1500 mm
Focal ratio
f/10
Optical design
Schmidt-Cassegrain
Focuser / eyepiece barrel
1.25 in visual back (SCT rear cell); a 2 in diagonal fits with an SCT-to-2 in adapter
Mount
Computerized single-fork altazimuth (GoTo)
Highest useful magnification (published)
354x
Optical tube weight
10 lb

Eyepiece ladder

2 pairings

The 6SE pairs a 150 mm aperture with the same 1500 mm f/10 optics as the C6 tube. It is the most portable of the mid-size SE fork-arm scopes and holds high magnification well on planets.

Because magnification is the telescope's 1500 mm focal length divided by the eyepiece focal length, a 25 mm eyepiece gives 60x here and a 10 mm eyepiece gives 150x. The highest useful magnification is the published 354x, beyond which the image dims and softens without showing more detail.

The focuser takes 2 in eyepieces, so long 2 in wide-field eyepieces such as the Omni 56 mm fit as well as 1.25 in ones.

Match an eyepiece, mount or camera