Be honest about what will work
Almost all phone-astrophotography disappointment comes from pointing a phone at the wrong thing. Start at the top of this list.
🌕 The Moon, through the eyepieceSuperb — start here
The single best thing a phone can do at a telescope, and it is not close. The Moon is bright enough that the phone behaves like a normal daylight camera. A steady hand and thirty seconds will give you a picture worth keeping. If you only take one photo tonight, take this one.
🌌 Constellations & the sky, on a tripodVery good
Modern night modes stack several seconds of exposure and pull out far more stars than your eye can see — often surprising people who have just been told the sky here is washed out. Needs the phone held completely still: a tripod, a wall, or wedged against a railing.
🪐 Planets, through the eyepiecePossible, expect little
Saturn's rings will show as a distinct shape and Jupiter's four moons come out as dots — that is a genuine achievement and worth doing. But a planet is a tiny, brilliant target, and the phone will usually blow it into a white blob unless you cut the exposure hard. Manage expectations before you look at the screen.
✨ Bright clusters, through the eyepieceHit and miss
Omega Centauri or the Pleiades can register with night mode held to the eyepiece. Anything fainter is fighting both the sky glow and a very small sensor.
🌫️ Nebulae and galaxiesDo not try tonight
These need long exposures on a tracking mount — the whole point of the Seestar. A phone at the eyepiece will show you a grey rectangle, and you will conclude the telescope is broken. It is not. Ask a volunteer to show you what the Seestar is capturing instead.