Here is the truth that telescope marketing won't tell you: through a 70mm refractor, the Moon looks absolutely spectacular, the planets look small but unmistakably real, and most galaxies look like faint grey smudges. That last part sounds like a letdown. It isn't. The light hitting your eye from that smudge left its galaxy millions of years ago, and you are catching it with a tube on your patio. Once you reset your expectations to what's actually possible, a 70mm telescope becomes a source of real wonder instead of disappointment.
Aperture is the spec that matters
Forget magnification numbers on the box. The headline spec of any telescope is its aperture — the diameter of the main lens or mirror. Aperture determines two things: how much light you gather (which sets how faint an object you can see) and your resolving power (how fine a detail you can split). A 70mm refractor gathers about a hundred times more light than your dark-adapted eye, which is why it reveals things your eye never could.
Magnification is secondary and easy to overdo. You change it by swapping eyepieces, but there's a ceiling: push past roughly 2x the aperture in millimeters (so about 140x for a 70mm scope) and you're just blowing up a blurry image. A bright, sharp view at 60x beats a dim, mushy view at 200x every time. Beware any telescope that brags about "525x power" — that number is meaningless.
What 70mm can and can't resolve
It can resolve: the craters, mountains, and ridges along the Moon's terminator in stunning detail; the disk of Jupiter with its main cloud bands and its four Galilean moons; the rings of Saturn as an actual separate ring (this is the view that makes people gasp); the phases of Venus; and a generous helping of double stars, star clusters, and the brighter nebulae. It can't resolve: surface detail on Mars beyond a tiny disk, faint galaxy structure, or anything that needs a much bigger light bucket. That's fine — it just defines a target list.
The best beginner targets
- The Moon. Start here every time. Catch it near first or last quarter, not full, so the low-angle sunlight casts long shadows and the craters leap out in 3D.
- Jupiter and its moons. The four bright dots flanking Jupiter are the moons Galileo saw in 1610. Watch them over a few nights and you'll see them dance from side to side as they orbit.
- Saturn's rings. Small but real, and unforgettable. No photo prepares you for seeing it live.
- The Orion Nebula (M42). A glowing cloud of gas where stars are being born, easily visible as a misty patch in winter.
- The Pleiades (M45). A sparkling cluster of blue-white stars, gorgeous at low power.
- Double stars like Albireo. A tight pair, one gold and one blue — a color contrast that's pure delight.
Polar aligning the mount
If your scope comes on an equatorial mount, it can track the sky's rotation with a single slow-motion knob — but only if you align it first. The basic idea: tilt the mount's main axis so it points at the celestial pole (near Polaris in the northern hemisphere). Set the mount's latitude scale to your latitude, then aim the polar axis at Polaris. Now as Earth turns, you can follow any object by turning just the one right-ascension axis, instead of chasing it with two. For visual observing you don't need perfect alignment — close is enough to keep things in the field of view for minutes at a time.
A 70mm refractor like our Starter Astronomy Kit is the right first telescope for the same reason a 70mm is the wrong last telescope: it's light, quick to set up, forgiving, and shows you the highlights of the solar system without a fuss. The people who fall in love with astronomy almost always start with a small scope and the Moon. This is that scope.