Binoculars are the most underrated instrument in amateur astronomy — no setup time, a wide enough field to sweep across the Milky Way in a way no telescope can, and genuinely striking views of star clusters, the Moon, and even brighter comets when one is passing through.
Reading binocular specs
Binoculars are described by two numbers, such as 10x50: the first is magnification, the second is objective lens diameter in millimetres, which determines light-gathering just as aperture does in a telescope. For astronomy, 7x50 and 10x50 are the two most commonly recommended configurations, balancing enough magnification to resolve detail against a wide enough field and steady enough handheld image to actually use comfortably.
Why 50mm is the sweet spot
Larger objective lenses gather more light, which matters for faint deep-sky targets, but they also add weight quickly — a pair of 20x80 binoculars is genuinely difficult to hold steady without a tripod. 50mm objectives hit a practical balance: enough light gathering for genuinely good views, light enough to hand-hold for a full session.
Our picks
- 7x50 wide-field — the lower magnification keeps the image steady handheld and gives an unusually wide, immersive field, ideal for sweeping star fields and the Milky Way's dust lanes from a dark site.
- 10x50 all-rounder — a small step up in magnification that starts resolving individual stars within clusters like the Pleiades and shows genuine surface detail on the Moon, while still being steady enough to hand-hold.
- 15x70 on a tripod — for observers willing to add a simple tripod adapter, this size reveals noticeably more in open clusters and brighter nebulae than a 50mm pair, at the cost of needing support to hold steady.
What binoculars show that a telescope doesn't
The wide true field of view in binoculars — often 6–8 degrees compared to a telescope's typical 0.5–1 degree — makes them uniquely good at large, sprawling targets like the Pleiades cluster, the Andromeda Galaxy's full extent, and comet tails, all of which can feel cramped or invisible in a telescope's narrower field.