Eyepiece and telescope pairing
Best eyepiece for the Celestron AstroMaster 114EQ
Which eyepiece gets the most out of the Celestron AstroMaster 114EQ, chosen by exit pupil rather than by guesswork.
- Aperture / focal length
- 114 mm / 1000 mm (f/8.77)
- Deep-sky pick
- Celestron Omni 15mm Plossl: 67x, 1.71 mm exit pupil
- Low-power pick
- Celestron Omni 40mm Plossl: 25x, 4.56 mm exit pupil
- Focuser barrel
- 1.25 in (both eyepieces fit)
For deep-sky detail, the Celestron Omni 15mm Plossl is the pick of the eyepieces here: at 67x it lands near the 2 mm exit pupil where faint-object contrast peaks in the Celestron AstroMaster 114EQ. For wide low-power sweeping, drop to the Celestron Omni 40mm Plossl at 25x.
An exit pupil near 2 mm is the classic sweet spot for teasing detail out of faint deep-sky objects, because it concentrates the light while keeping the image bright enough. In the Celestron AstroMaster 114EQ the Celestron Omni 15mm Plossl lands there, at 67x with a 1.71 mm exit pupil and a 0.75 degree field.
For a low-power finder-and-framing view you want a wider exit pupil, around 5 mm. Here the Celestron Omni 40mm Plossl gives 25x, a 4.56 mm exit pupil and a 1.6 degree field, the widest true field of the eyepieces that fit this focuser.
Eyepieces to buy
Search Amazon for Celestron Omni 15mm Plosslaffiliate searchFind Celestron Omni 15mm Plossl on eBayaffiliateSearch Amazon for Celestron Omni 40mm Plosslaffiliate searchFind Celestron Omni 40mm Plossl on eBayaffiliate