A 70mm telescope is a great starting point for beginners as well as more intermediate astronomers. You can have a decent view of almost all of the prominent objects in the night sky seen from the earth. In this article, I am going to share what you can see with a 70mm telescope.
A 70mm telescope (2.8” aperture size) will provide you with a clear view of the Moon and its craters. You can also check out some of the bigger planets in the solar system. Though don’t expect to see every detail of the planets.
Things You Can See With a 70mm (2.8” Aperture) Telescope
Before I start listing out the celestial objects, let me say that, with a telescope, nothing can be absolutely certain. The visibility will mostly depend on the atmosphere, light pollution, condition of the sky, your eyepiece quality, etc. Also, you’ll need a decent quality telescope to identify most of the celestial objects in the night sky. If you are looking for good quality telescopes that won’t break the bank but produce a good quality image, I’ll really recommend to check out my recommendation on the best telescopes for viewing planets and galaxies.
You’ll also need to know the ‘f/no’ parameter of the telescope. If the telescope is labeled as f/15, then the focal length will be f = 15 x 70mm = 1050 mm.
So, with a 10mm eyepiece, you’ll have about 100x magnification. You can easily add a 2x Barlow lens and enjoy a whopping 200x magnification.
However, more magnification doesn’t always mean a better view. For understanding all these parameters, read my article on eyepieces.
Considering a clear night sky with minimal light population, you can see the following celestial objects with a 70mm telescope:
Objects With In the Solar System
- The moon along with its craters
- The rilles of the moon
- Phases of the Mercury
- The polar caps of Mars
- Major dark surface of the Mars
- Cloud belts on the Jupiter (Here you can read my article on how to see Jupiter)
- Jupiter’s moons and their shadows
- Saturn, its rings and about 4-5 Saturn moons
- Sunspots (Of course with an aperture filter)
- Neptune and Uranus (Not very clear)
Stars and Nebulas
- Some double stars (1.5 – 2 arc-second separation) e.g. Albireo, Mizar, etc.
- Stars with about 11.5 to 12 stellar magnitude
- Emission nebulas
- Globular clusters
- Distant galaxies
- Planetary nebulas etc.