Binoculars vs. Telescope: Which Should a Beginner Buy?

A telescope is the first thing many people think of buying for stargazing, but it has drawbacks for a beginner. It shows a tiny piece of sky, takes time to set up and is hard to aim if you don’t yet know where things are. Binoculars avoid most of that, which is why NASA’s Night Sky Network calls them “a great first telescope”.

You don’t need either to start. NASA’s skywatching FAQ points out that the Moon, planets, meteors and constellations need no equipment at all. But if you want to see more, here is how the two compare.

What the numbers on binoculars mean

Binoculars are labeled with two numbers, such as 7x35 or 10x50. The first is the magnification: 10x makes things look ten times closer. The second is the diameter of each front lens in millimeters. Bigger lenses gather more light, so fainter things show up.

The Night Sky Network recommends sizes from 7x35 to 10x50 for astronomy. Above about 10x50, binoculars get heavy and every shake of your hands is magnified, so they need a tripod or image stabilization. A 7x50 or 10x50 pair is a common choice.

There are two main designs. Porro-prism binoculars have the classic zigzag shape. Roof-prism binoculars are straight and more compact. Both work for stargazing, and the Night Sky Network suggests trying a few at a star party before buying.

What binoculars show

Binoculars give you a wide, bright, right-side-up view, using both eyes. According to the Night Sky Network, a good pair shows:

• The Moon: craters down to about 6 miles across, plus mountain ranges and the dark lava plains, or maria.
• Jupiter’s moons: usually at least one or two of the four big ones, as tiny points of light next to the planet. Watch over a few nights and you can see them change places.
• Star clusters: the Pleiades, which turn from a small fuzzy patch into a group of bright stars.
• The Andromeda Galaxy: a faint, oval smudge from a dark site.

What binoculars won’t show is detail on the planets. Saturn’s rings and Jupiter’s cloud bands are too small to see at 10x.

What a telescope adds

A telescope’s main job is to gather more light than your eye or binoculars can, and to magnify a small area of sky. The most important number is its aperture, the diameter of the main lens or mirror. A larger aperture shows fainter objects and finer detail. Magnification matters much less, because the eyepiece sets it, and you can swap eyepieces.

The Night Sky Network’s planet notes give an idea of what small telescopes show:

• Jupiter: all four large moons, the dark cloud bands across the planet, and sometimes the Great Red Spot.
• Saturn: the rings, clearly separated from the planet, and its largest moon, Titan. A 4-inch telescope shows Titan even from the suburbs.
• The Moon: sharp detail along the line between light and dark, where shadows are long.
• Double stars, clusters and brighter nebulae and galaxies. Larger telescopes show more of the faint objects, as NASA’s FAQ notes.

Set your expectations, though. Planets look small in any backyard telescope. Saturn will look like a tiny, perfect ringed ball, not the large, colorful view of a NASA image. Faint galaxies look like soft gray patches, not colorful spirals. Those photos come from long exposures and large instruments.

Choosing a first telescope

The Night Sky Network’s advice on a first telescope comes down to a few points:

• Aperture beats magnification. A telescope advertised as “600x” is a warning sign. Its useful magnification is set by its aperture, and cheap models with huge numbers are often too shaky and dim to use.
• Consider a Dobsonian. A Dobsonian is a reflector (it uses a mirror) on a simple, sturdy mount that swings up and down and left and right. A 4.5- to 8-inch Dobsonian is the usual recommendation, and the Night Sky Network put the cost at about $200 to $500 when it wrote its guide in 2020.
• Refractors cost more. Telescopes with a lens instead of a mirror cost more than reflectors of the same aperture.
• Skip Go-To at first. Computerized mounts need setup with a few known stars, which is hard if you don’t yet know any.
• The mount matters. A telescope on a shaky mount is frustrating, because the view keeps jiggling and the target drifts away.

Side by side

	Binoculars	Small telescope
Typical cost	Low	Moderate
Setup time	None	A few minutes, more for a Go-To alignment
Field of view	Wide, easy to aim	Narrow, harder to aim
Best for	Moon, star clusters, Jupiter’s moons, scanning the sky	Planet detail, Saturn’s rings, double stars, small faint objects
Portability	Fits in a bag	From grab-and-go to car-sized
Use for other things	Birds, sports, travel	Astronomy only

Our suggestion

Start with a decent pair of 7x50 or 10x50 binoculars and learn your way around the sky with them. Use our planet pages to see which planets are up, and point the binoculars at the Moon on a few nights near first quarter, when shadows make the craters stand out. Our moon phase page shows what phase is coming.

If you find yourself wanting more, try a telescope before buying one. The Night Sky Network suggests visiting a local astronomy club or star party: members are usually happy to show you their telescopes, and some clubs lend them. You’ll see the difference between models for yourself. And the binoculars won’t go to waste: the Night Sky Network notes that experienced observers keep using theirs.