Telescopes / 700mm focal length
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700mm Telescopes

Checked 2026-10-24

Standard length for refractor telescopes providing good magnification 5 telescopes · 4 brands

For adults For beginners For kids Refractor For moon viewing Portable Tripod included For travel Budget With phone adapter Altazimuth mounts 90mm aperture 80mm aperture Equatorial mounts Reflector 70mm aperture Professional For bird watching For deep sky For astrophotography 600mm focal length Black Smart Digital Dobsonian 800mm focal length Monocular 400mm focal length White 50mm aperture STEM learning Tabletop mounts Maksutov-Cassegrain 130mm aperture 60mm aperture 900mm focal length 114mm aperture 300mm focal length Blue Waterproof 700mm focal length Red Green

Best 700mm Telescopes

# Item Level House Notes See listing
1 Black 90mm refractor telescope for moon viewing 8.3 Koolpte Black 90mm refractor telescope for moon viewing $190 Koolpte Black · For adults · Refractor
$190 See listing
2 Red Planet Newtonian reflector with tripod 8.1 Carson Red Planet Newtonian reflector with tripod $168 Carson Red · For beginners · For moon viewing
$168 See listing
3 White 90mm refractor for beginner astronomy 8.4 FREE SOLDIER OPTICS White 90mm refractor for beginner astronomy $130 FREE SOLDIER OPTICS For adults · For beginners · Refractor
$130 See listing
4 White 90mm refractor telescope for adults 7.9 Koolpte White 90mm refractor telescope for adults $190 Koolpte For adults · Refractor · 90mm aperture
$190 See listing
5 Omega 700mm reflector for deep sky 7.7 Educational Insights Omega 700mm reflector for deep sky — Educational Insights For adults · For beginners · For kids
— See listing
Before you buy

700mm focal length questions

What can I see with a 700mm focal length telescope?

The moon shows craters and terminator detail well, and the brighter planets resolve into disks with some surface or cloud features on steady nights. Double stars and brighter deep-sky objects are reachable, though large nebulae are framed tightly. It is a length that favors lunar and planetary work over wide-field scanning.

Is a 700mm refractor or a 700mm reflector better?

A 90mm refractor gathers more light and avoids the central obstruction of a Newtonian, which some viewers prefer for crisp lunar edges. A 76mm reflector reaches the same focal length with a different optical path and a distinct image character. The choice comes down to whether you want the refractor’s simpler, obstruction-free view or the reflector’s mirror-based design.

What eyepieces work with a 700mm focal length?

The refractors ship with advanced eyepieces intended to push magnification for lunar and planetary viewing, and the reflector uses its own set covering the 35-78x range. Because focal length is fixed, swapping eyepieces is how you move between wider context views and close-in detail. A short eyepiece gets you toward the upper magnification the aperture can support.

What a 700mm focal length does at the eyepiece

A 700mm focal length sits in the middle of the range, long enough to pull detail out of the moon and the brighter planets without demanding a heavy mount. Paired with a 90mm aperture, as in several refractors here, it delivers useful magnification on craters, cloud bands, and the rings of Saturn when the air is steady. Buyers drawn to this length usually want a telescope that shows more than a wide-field sweeper but still sets up in a backyard without a permanent pier.

The trade-off is field of view. At 700mm, wide star fields and large nebulae are framed tighter than they would be at 400mm or 600mm, so if your interest runs to scanning the Milky Way, a shorter tube serves better. If your interest runs to the moon and planets, the extra length earns its place. The refractors here lean toward that planetary and lunar use, and the Newtonian reflector in the group offers a different optical path at the same focal length.

How 700mm tubes are put together

The refractors in this group use a 90mm objective in a tube that stays manageable on an alt-azimuth mount, with the Vertisteel versions finished in white or black. A Newtonian reflector at 76mm also appears at this focal length, in red, using a mirror rather than a lens to reach the same magnification range. The color options are limited but distinct: black, white, and red cover the group.

Eyepieces matter as much as the tube at this length. The refractors ship with advanced eyepieces meant to push magnification higher for lunar and planetary viewing, and the reflector uses its own eyepiece set for the 35-78x range. Because the focal length is fixed, changing eyepieces is how you move between low-power context views and close-in detail. A 700mm tube with a modest eyepiece gives a comfortable medium power; a short eyepiece pushes toward the upper end of what the aperture can support.

Related
For adults For moon viewing 90mm aperture For beginners Refractor Reflector White