Astrophotography for beginners: what you need and what to shoot first

2 November 2026 · 3 min read

Deep-sky astrophotography means photographing things far too faint to see well by eye: nebulae, galaxies and star clusters. It's easier to start than most people expect, as long as you put your money in the right places and pick forgiving targets.

How it works

Faint objects need a lot of light. Instead of one very long exposure, you take dozens or hundreds of shorter ones, called subs (often 30 seconds to 5 minutes each), and combine them in software. This is stacking, and it's what turns grainy single frames into a smooth image. To keep stars round over each sub, the camera has to follow the sky as the Earth turns. That's the job of the mount.

What you need, in order of importance

1. A tracking mount. It matters more than the telescope. A wobbly or overloaded mount ruins every frame, however good the optics. Start with a star tracker for camera lenses, or an equatorial mount for a small telescope, and stay well inside its payload rating. See Star tracker or equatorial mount?.
2. A camera. A DSLR or mirrorless camera you already own is a fine start. A dedicated astro camera, especially a cooled one, gives cleaner data and is easier to control from a computer.
3. Optics. A camera lens of 50–135 mm or a small refractor of 250–450 mm focal length is the forgiving place to begin. Short focal lengths hide tracking errors, and wide fields suit the big, bright targets.
4. Software. Free programs such as Siril and DeepSkyStacker stack and stretch your images. Capture is done by the camera itself, a laptop, a mini PC or a small dedicated controller.

Everything after that (guiding, filters, a cooled mono camera, a filter wheel) is an upgrade, not a requirement.

The beginner traps

• Too much focal length too soon. A long telescope magnifies every tracking error. Most people who start with one end up buying a small refractor anyway.
• An overloaded mount. The number on the box is not your imaging limit. See How much can your mount really carry?.
• Parts that don't fit together. Back focus, adapters and filter sizes catch almost everyone out. The rig builder checks them for you.
• Shooting under a bright moon. Galaxies and reflection nebulae need dark nights.

Your first targets

Start big and bright. Each of these looks good from a suburban garden with a short focal length:

• Orion Nebula (M42), winter. The easiest nebula of all. How to photograph it.
• Andromeda Galaxy (M31), autumn. Big enough for a 135 mm lens. How to photograph it.
• Pleiades (M45), autumn and winter. Bright blue stars, with dust under dark skies. How to photograph it.
• North America Nebula, summer. Glowing red hydrogen in Cygnus. How to photograph it.

What to image each season has a longer list.

Planning your first night

You need three things at once: a clear sky, real darkness, and your target well above the horizon. On top of that, the moon should be down or thin for galaxies. That combination is rarer than it sounds, so plan ahead:

1. Check the cloud forecast from more than one weather model.
2. Make sure it's astronomically dark, not just after sunset. See When is it dark enough?.
3. Check where the moon is. See Astrophotography and the moon.
4. Set up while it's still light, polar align, and focus on a bright star.

RigTonight's Tonight tab puts all of that on one screen for your location and ranks the targets worth shooting with your gear.

When you're ready to grow, Your first deep-sky rig compares three sensible next steps.