Optical reference
Celestron NexStar 5SE: aperture, focal length and eyepiece fit
What the Celestron NexStar 5SE measures, the magnification and true field each eyepiece produces in it, and the barrel, mount payload and camera adapter that fit.
Published specifications
Eyepiece ladder
2 pairings| Pairing | Magnification | True field |
|---|---|---|
| Celestron Omni 6mm Plossl in the Celestron NexStar 5SE | 208x | 0.24 deg |
| Celestron Omni 15mm Plossl in the Celestron NexStar 5SE | 83x | 0.6 deg |
The 5SE is a compact 125 mm f/10 catadioptric. Its 1250 mm focal length gives sharp, contrasty planetary views in a tube light enough for the single-fork mount to carry easily.
Because magnification is the telescope's 1250 mm focal length divided by the eyepiece focal length, a 25 mm eyepiece gives 50x here and a 10 mm eyepiece gives 125x. The highest useful magnification is the published 295x, beyond which the image dims and softens without showing more detail.
The focuser takes 1.25 in eyepieces, so use 1.25 in eyepieces; a long low-power 2 in eyepiece will not fit this focuser.