Optical reference
Celestron StarSense Explorer DX 102AZ: aperture, focal length and eyepiece fit
What the Celestron StarSense Explorer DX 102AZ 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 4mm Plossl in the Celestron StarSense Explorer DX 102AZ | 165x | 0.3 deg |
| Tele Vue 13mm Nagler Type 6 in the Celestron StarSense Explorer DX 102AZ | 51x | 1.62 deg |
The DX 102AZ is a 102 mm f/6.5 achromatic refractor with phone-guided star finding. The 660 mm focal length is short for a refractor, so it frames wide fields at low power and needs short eyepieces for planetary magnification.
Because magnification is the telescope's 660 mm focal length divided by the eyepiece focal length, a 25 mm eyepiece gives 26x here and a 10 mm eyepiece gives 66x. The highest useful magnification is the published 241x, 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.