Why Purchase from All-Star Telescope?
Free Expert Support
Whether you are a first timer needing help with setting up or an enthusiast that can't quite make that one thing work, our expert staff are ready to support your needs. With decades of knowledge and first hand experience we've been there and we can help you through it!
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You can trust purchasing and delivery with All-Star Telescope. All of our transactions are 100% secure and Level 1 PCI DSS compliant thanks to Shopify's ShopPay platform. For additional protection, we insure 100% of the value of every shipment we make. If it get's lost during shipment, we replace it. If it gets damaged during shipment, we replace it. We make sure your product arrives exactly as you would expect it to; we promise.
We also ensure privacy protection. We never keep any of your credit card information on file and any of your personal data is stored according to our policies.
30 Day Return Policy
Buy with confidence knowing that we accept returns up to 30 days after purchase. We want you to have something you will actually use and we are confident that we keep good quality products in our store with No Junk.
Price Match Promise
Shipping around for the best price is tough, we make it easier by offering the best pricing in the market. But if you find a better price on an in-store item somewhere else we will match it!
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Why we love the Sky-Watcher Startravel 102 AZ3 Refractor Telescope (S10100)
Product Description
This Sky-Watcher 102mm (4") f/5 telescope is a two-element, air-spaced, fully multi-coated objective, achromatic refractor, which can give exciting "rich field" astronomical views. It can provide excellent vistas of star fields, clusters, nebulae, galaxies, planets, the Moon and (with correct filtering or by projection) the Sun. It is also a fine terrestrial telescope when mounted on an alt-azimuth mount or a photographic tripod.
Crisp images at a reasonable price make it an excellent beginner's "first telescope", or a great travelling telescope for a more advanced observer. Similar to the popular 80mm f/5 refractor, this larger aperture model has more light collecting power at the same focal ratio and accepts 2" diagonals for awesome wide field views, while only a small amount of chromatic aberration and weight.
Weighing about 3kg. (6.5lbs.) the optical tube assembly is readily carried and with a compressed length of approximately 50cm (21.7") it is easily transported. Being a refractor, it is quick and easy to set up and the low- maintenance, enclosed optics come fully collimated from the factory.
The optical tube assembly (OTA) comes with "tube mounting rings". These hinge open to allow easy installation of the optical tube and the locks can be loosened during use to allow tube rotation and balancing. Mounting the telescope on an alt-azimuth or an equatorial mount is quick and simple with the appropriate mounting plate. This telescope also performs well as a fixed aperture, 510mm lens for both terrestrial and astrophotography.
The "fast" f/5 focal ratio, combined with today's high-speed films, is excellent for capturing lunar and solar eclipses as well as for nature photographs. A solid, equatorial mount and a method of guiding are required for longer exposure astrophotography. A T-mount thread on the eyepiece holder allows direct attachment of an appropriate T-adapter and the optional extension tube gives closer focusing for terrestrial photography.
What can I see with a Sky-Watcher Startravel 102 AZ3 Refractor Telescope (S10100)?
Here are some simulated views of common objects. Results with your telescope will vary with viewing conditions, obrits, equipment and more.
Jupiter with
25mm Eyepiece - 20x Magnification
(Included with This Telescope)
Jupiter with
10mm Eyepiece - 50x Magnification
(Included with This Telescope)
Jupiter with
5mm Eyepiece - 100x Magnification
Sold Separately
Moon with 25mm Eyepiece
20x Magnification
(Included with This Telescope)
Moon with 10mm Eyepiece
50x Magnification
(Included with This Telescope)
Moon with 5mm Eyepiece
100x Magnification
Sold Separately
Andromeda with 36mm Eyepiece
14x Magnification
Sold Separately
Andromeda with 25mm Eyepiece
20x Magnification
(Included with This Telescope)
Andromeda with 10mm Eyepiece
50x Magnification
(Included with This Telescope)
What's in the Box
Specifications
| Optical Design | Achromatic Refractor |
| Diameter | 102mm |
| Focal Length | 500mm |
| F/ratio | F/5 |
| HIghest Practical Power | 204x |
| Faintest Stellar Magnitude | 13.1 |
| Resolving Power | 1.13 |
| Focuser Diameter | 2" with 1.25" adapter |
| Diagonal | 45 degree erect image |
| Eye Pieces | 1.25" Super 25 and 10 |
| Mount Type | Alt-Azimuth |
Additional Articles, Videos, and Links
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Buying Your First Telescope - Part One: What's the Best Beginner Telescope?
Buying the right telescope as a beginner can be a real challenge. In these articles we explain the key considerations when buying a beginner telescope. We'll cover the vocabulary you're going to...
Buying Your First Telescope - Part Two: Making the Choice
Once you have become familiar with the sky and have been enticed by the views through other peoples’ telescopes, you will want your own. So what to buy?
Buying Your First Telescope - Part Three: Our Recommendations (2023)
We present our suggestions for telescopes we find offer great value in each of several price ranges. But within a price class, you have a choice of what features might be most important to you and ...
How to Pick the Best Telescope Eyepieces
Finding the right new telescope eyepiece can be a game changer. This post will help you to pick the best telescope eyepiece for your needs.