Eyepiece and telescope pairing
Best eyepiece for the Sky-Watcher Evostar 72ED
Which eyepiece gets the most out of the Sky-Watcher Evostar 72ED, chosen by exit pupil rather than by guesswork.
- Aperture / focal length
- 72 mm / 420 mm (f/5.8)
- Deep-sky pick
- Celestron Omni 12mm Plossl: 35x, 2.06 mm exit pupil
- Low-power pick
- Explore Scientific 30mm 82 Degree: 14x, 5.14 mm exit pupil
- Focuser barrel
- 2 in (both eyepieces fit)
For deep-sky detail, the Celestron Omni 12mm Plossl is the pick of the eyepieces here: at 35x it lands near the 2 mm exit pupil where faint-object contrast peaks in the Sky-Watcher Evostar 72ED. For wide low-power sweeping, drop to the Explore Scientific 30mm 82 Degree at 14x.
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 Sky-Watcher Evostar 72ED the Celestron Omni 12mm Plossl lands there, at 35x with a 2.06 mm exit pupil and a 1.43 degree field.
For a low-power finder-and-framing view you want a wider exit pupil, around 5 mm. Here the Explore Scientific 30mm 82 Degree gives 14x, a 5.14 mm exit pupil and a 5.86 degree field, the widest true field of the eyepieces that fit this focuser.