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 EvoStar 100ED APO Refractor Telescope OTA (S11120)
Product Description
Sky-Watcher's Evostar apochromatic doublet refractors are the perfect blend of superior extra-low dispersion glass and affordability. The Evostar refractor lens assembly utilizes a proprietary combination of matched lenses, delivering tack-sharp stars with charcoal-black, contrast-rich skies. All ED glass elements are fluorite-based and feature our proprietary Metallic High-Transmission Coatings (MHTC), virtually eliminating all false color while triple-baffles prevent stray light from affecting your photography. Like the optics, the tube is beautifully crafted using aluminum and finished with a black diamond metal-flake finish.
Using a doublet refractor instead of a triplet has some advantages: less glass means less weight, less weight means a less expensive telescope, so you can dedicate more money for your camera or laptop while benefiting from a lightweight astrophotography rig.
The Evostar 100ED comes in a foam-lined aluminum case fully loaded with accessories, including: 2-inch Crayford-style focuser, 2-inch dielectric diagonal, two 1.25-inch eyepieces (5mm and 25mm), an 8x50 right-angle finderscope, tube rings, and a V-style dovetail.
What can I see with a Sky-Watcher EvoStar 100ED APO Refractor Telescope OTA (S11120)?
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 - 36x Magnification
(Included with This Telescope)
Jupiter with
5mm Eyepiece - 180x Magnification
(Included with This Telescope)
Jupiter with
5mm Eyepiece - 180x Magnification
Sold Separately
Moon with 25mm Eyepiece
36x Magnification
(Included with This Telescope)
Moon with 5mm Eyepiece
180x Magnification
(Included with This Telescope)
Moon with 5mm Eyepiece
180x Magnification
Sold Separately
Andromeda with 36mm Eyepiece
25x Magnification
Sold Separately
Andromeda with 25mm Eyepiece
36x Magnification
(Included with This Telescope)
Andromeda with 5mm Eyepiece
180x Magnification
(Included with This Telescope)
What's in the Box
Specifications
| Optical Info | |
| Optical Design | ED Doublet |
| Lens Coatings | Fully Multi-Coated |
| Glass Type | BK7/FPL-53(ED) |
| True Aperture (mm) | 100 |
| Primary Aperture (mm) | 100 |
| F/Ratio | 9 |
| Focal Length (mm) | 900 |
| Observational Info | |
| Dawes Limit | 1.16 |
| Rayleigh Limit | 1.4 |
| Limiting Mag. | 12.5 |
| Minimum Magnification | 14 |
| Maximum Magnification | 197 |
| Light Gathering (compared to next size down) | 56% |
| General Info | |
| Focuser | 2" Dual Speed Crayford |
| OTA Length (Retract/Ext.) | 34" |
| OTA Outer Diameter | 4.5625" |
| OTA Weight (with accessories) | 8.4 |
| Accessories | |
| Included Finder | 8x50 RACI |
| Included Diagonal | 2" Dielectric |
| Mounting Accessories | Rings/V-Rail |
| Included Eyepieces | 25mm LET/5 Planetary |
| Magnification w/ Included Eyepieces | 45x/180x |
| Included Case | Yes |
| Corrector | No (optional) |
Customer Reviews
The Sky-Watcher EvoStar 100ED APO refractor telescope is an incredible value given all that's included with the scope. This includes an 8x50 right angle finder scope, a 2" diagonal, a foam-lined aluminum case, two handy eyepieces (5 and 25 mm) and let's not forget the 100 mm diameter refracting telescope with 900 mm of focal length. This 900 mm, f/9 scope is the perfect balance between magnification and image quality through the eyepiece.
The 8x50 finder scope is a perfect addition to this instrument, making targeting deep sky objects very easy using a motor drive mount or a manual mount. Aligning the finder scope to the main tube is a bit tricky. Having a little more room in the finder scope mounting rings would make the alignment process with the main body tube a little easier.
The dovetail mounting bar makes connecting the telescope to the mount very easy. The dovetail bar also includes two 1/4" 20 threaded mounting holes for mounting the telescope to a heavy duty tripod. This is very handy when aligning the finder scope to the main body tube.
The 25 mm eyepiece provides a very comfortable experience for causal observing. The 5 mm eyepiece offers 180x magnification with a very wide field of view. This was an unexpected bonus while observing Jupiter and its moons. At this magnification, the focus is a little sensitive. This is where the 2" dual speed Crayford-style focuser and the fine adjustment **** are really handy to get a sharp focus at these larger magnifications. At these larger magnifications the focus lock **** is very important to hold a sharp focus especially with a heavy eyepiece or DSLR camera under below zero conditions.
Using an additional Sky-Watcher 2" 28 mm eyepiece provides outstanding wide angle eye comfort looking at the Pleiades, and a host of globular and open clusters. The Andromeda and Triangulum galaxies offered an outstanding show through this telescope. Keep the magnifications lower for better contrast and to reduce eye fatigue. The contrast of starlight to the background is excellent with this telescope with no experienced chromatic aberration from a dark observing site.
The Sky-Watcher EvoStar 100ED APO refractor telescope offers outstanding quality for a really good price-point.
First impressions
- Excellent scope for visual work, only a few observations so far. I think this scope will be a much better balance of portability vs aperture vs my 8" dob. I bought a cheap tripod elsewhere, which was a mistake. Explore Scientific Twilight I tripod is on the way, hopefully that will work much better.
-Finder scope did not work for me. I was not able to calibrate it, may have been a build quality problem. Red dot finder on the way.
-Eyepieces are ok. 2" 38mm and 1.25" 15mm eyepieces have arrived to fill in gaps around 25 mm and 5 mm, will try these out once the proper tripod arrives.
Additional Articles, Videos, and Links
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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.