Sky-Watcher ProED 100mm f/9 Doublet APO Refractor (OTA only)

Sky-Watcher ProED 100mm f/9 Doublet APO Refractor (OTA only)

Sky-Watcher ProED 100mm f/9 Doublet APO Refractor (OTA only)

B&H # SKPRO100EDAP MFR # S11120

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Value: $35.00

Product Highlights

  • 100mm Apochromatic Refractor
  • 900mm Focal Length, f/9 Focal Ratio
  • Proprietary MHC Multicoated Optics
  • Schott BK-7 and FPL-53 ED Glass
  • 2" Crayford Focuser with 1.25" Adapter
  • 20mm and 5mm Eyepieces, 90° Diagonal
  • 8x50 RA Erect-Image Finderscope
  • Vixen-Style Dovetail Plate & Cradle-Ring
  • Foam-Lined Aluminum Carrying Case
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Aperture: 100mm / 4", f/9

100mm / 4", f/9 120mm / 5", f/7.5

More on the Way

80mm / 3", f/7.5

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Sky-Watcher Pro 100ED APO overview

  • 1Description

The ProED 100mm f/9 Doublet APO Refractor from Sky-Watcher features a doublet apochromatic lens system with Extra-low Dispersion (ED) glass and Sky-Watcher's proprietary photon anti-rejection Metallic High-Transmission Coatings (MHC) on all air-to-glass optical surfaces. This combination of glass, lenses, and coatings virtually eliminates chromatic aberrations for clear and bright high-contrast images with true color rendition. This is a versatile optical tube assembly (OTA) that is well suited for wide-field astronomical observation of prominent nebulae, star clusters and galaxies, or can be used as an astrograph for sky photography, a terrestrial spotting scope or telephoto lens. The aperture of this 100mm model of the ProED not only increases image brightness over the smaller 80mm version, it improves resolution and contrast.

A mounting cradle-ring clamps over OTA and allows the user to adjust the orientation and position of the scope relative to the mount to optimize viewing comfort and balance, while avoiding interference with other equipment. The scope is offered without a mount or tripod, but a Vixen-style dovetail plate makes it compatible with any alt-az or equatorial mount with a Vixen-style saddle.

Its two-speed Crayford-style focuser helps make fine-focusing fast and precise without backlash. The ProED comes with several accessories to help you get observing faster and easier. First, are two long eye relief eyepieces that produce 30 and 120x magnification, a 90° star diagonal for more comfortable viewing, and a large 8x50 erect-image finderscope to make finding your celestial objects faster and easier. Finally, Sky-Watcher provides a foam-lined aluminum carrying case to safely store and transport the OTA.

Optical Performance
  • 100mm objective lens
  • 900mm focal length
  • Focal ratio: f/9
  • Refractor-style optical design
  • Extra-low Dispersion (ED) glass
  • Apochromatic doublet lenses eliminate chromatic aberrations for true color rendition and enhanced contrast
  • Proprietary anti-reflection Metallic High-Transmission Coatings (MHC) multicoatings on all optics
  • Bbjective lens cell is light-baffled to reject stray, unfocused light
  • Baffled draw tube for enhanced contrast
  • OTA interior is flat blackened to help prevent unfocused internal light reflections from reaching the focal plane
  • Resolution, Rayleigh: 1.39 arc sec
  • Resolution, Dawes: 1.16 arc sec
  • 2" diameter focuser
  • Dual-speed Crayford-style
  • Crayford focusers use a toothless friction system that allows for super-fine precision focusing without backlash
  • Includes 1.25" adapter for using smaller eyepieces and accessories
Included Accessories
  • Two 1.25" barrel diameter eyepieces:
    • 5mm eyepiece: Yields 180x magnification
    • 20mm eyepiece: Yields 45x magnification
  • Diagonal:
    • 90° angle
    • Dielectric coatings for greater than 99% reflectivity
    • Star diagonal corrects images vertically, but not horizontally
  • 8x50 erect-image finderscope with bracket
  • Foam-lined hard aluminum carrying case
  • User-supplied mount and tripod required
  • Vixen-style dovetail plate included
  • Compatible with any alt-az or equatorial mount with a Vixen-style saddle
  • Cradle-ring assembly for plate allows the scope orientation to be changed based on mount configuration
  • Integrated 1/4"-20 piggy-back camera mount for wide-field astrophotography
  • Quick-release system for fast setup and breakdown
UPC: 812556011238
In the Box
Sky-Watcher ProED 100mm f/9 Doublet APO Refractor (OTA only)
  • 5mm Eyepiece
  • 20mm Eyepiece
  • 2" 90&Deg; Diagonal
  • 1.25" Eyepiece Adapter
  • 8x50 Finderscope with Bracket
  • Mounting Plate and Cradle Ring Assembly
  • Foam-Lined Aluminum Carrying Case
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description

    Sky-Watcher Pro 100ED APO specs

    Optical Tube Assembly
    Optical Design Apochromatic Refractor
    Aperture 100 mm / 3.9"
    Focal Length 900 mm
    Focal Ratio f/9
    Eyepiece Barrel Diameter 2"
    Diagonal Yes, 90 Star
    Finderscope Yes
    Mounting System Vixen Style
    Weight 10.0 lb / 4.6 kg
    Packaging Info
    Package Weight 26.4 lb
    Box Dimensions (LxWxH) 41.0 x 16.0 x 11.0"

    Sky-Watcher Pro 100ED APO reviews

    ProED 100mm f/9 Doublet APO Refractor (OTA only) is rated 4.7 out of 5 by 7.
    Rated 5 out of 5 by from Fantastic optics and excellent value I bought the SW ProED 100 as a compliment to my Nexstar 8SE.� I can't believe how much better the views are with this scope.� Yeah it doesn't produce the same brightness as the 8" aperture, but, the images are much sharper with stars showing up as pinpoints and not fuzzballs.� You can push the magnification to 150+ and maintain much better clarity and definition.� The two speed focuser works great and the eyepieces are ok, I have a set of Celestron Plossls and a 8-24 Baader Planetarium so I don't have much need for them. The case is a nice feature and is of decent quality.� �If you're looking for a great reasonably priced "step up" from a beginner scope, this would be an excellent choice!
    Date published: 2018-03-11
    Rated 5 out of 5 by from Arguably the best general purpose scope available today, This 4 ED refractor combines extreme value with great FPL53 optics and a longish F9 focal ratio for crisp, colorfree views. It absolutely excels at planets, open clusters and double stars. Under dark skies many galaxies and other DSOs are easily in reach of this OTA. It is ready to view out of the box. It is lightweight, so works well with many alt az and Equatorial mounts. I chose the Celestron AVX which carries this scope brilliantly.
    Date published: 2016-01-27
    Rated 5 out of 5 by from Very High Quality in all the right places. This is a 5 star scope masquerading as a 4 star scope! My larger refractor is an Astro Physics, a 5 star scope in all details. In the SkyWatcher Pro ED 100 the optics of the tube itself are excellent. Albireo shines as a lovely sapphire and gold double. The double double in Lyra cleanly splits with inky black highlighting the right angles in this four star arrangement. Deep Sky objects are well served, with star definition in M4 for example, but remember this is a four inch refractor, not a 12.5 inch Dob. The telescope itself and its finish are really first rate. The rings, dovetail, case, 5mm eyepiece, finder scope, lens caps, and diagonal function properly, are solid and well made. The 25mm eyepiece, a few details inside the case, and the focuser all work serviceably but aren't at the level of finish the scope itself exhibits. Bottom Line: compared to a superb scope, the SkyWatcher Pro ED 100 holds its own in contrast, sharpness, (lack of) light scatter, color fidelity. Expensive glass, well put together (mine arrived perfectly collimated), high level finish on the tube and dew cap: in all the essentials this is a five star telescope. You can spend four times as much on another 4 inch scope that also addresses the less essential details, or save most of that money and upgrade only what is important to you. The SkyWatcher PRO ED 100 is therefor a fantastic value.
    Date published: 2016-06-30
    Rated 4 out of 5 by from Good by plan on component upgrades I was looking for a good apochromatic refractor for visual astronomy and astrophotography. This appeared to give the best bang for the buck. First the good - the scope is light enough to be portable (I habitually take it to a dark sky site 30 miles away) and appears solid. The main optics are very good; with good eyepieces (more on this later), I see no chromatic aberration around the moon or Jupiter. The diagonal and focuser are very usable for visual observing. I like the two speed feature of the focuser, and it is surprising how much detail can be brought out through fine focusing, particularly on lunar craters. I am anticipating having to upgrade the focuser when I get into serious astrophotography, but it works for now. Things that can be improved - the included finder scope is adequate, usable, and maintains alignment with the primary, but the threads are plasticky and I've had it come apart a number of times. Attachment to the OTA can be improved as well. The less said about the included eyepieces the better. I was fortunate to have a set of Plossls from my astronomy club to get started. A 9mm edge on planetary that I later purchased started to truly bring out the potential of this scope. Jupiter shows great contrast and detail, and I could split the Epsilon Lyrae double double inexperienced in this as I am. Bottom line - reduce your frustration by purchasing good eyepieces from the get go. All in all, this was about what I expected, and probably the best value for the money if you are looking for a good APO. The OTA itself is good, which is the most important thing. Good finder scopes are not expensive to find and can be added on. The included eyepieces are probably good enough for a couple of nights to get you starting to think of what focal length good eyepieces make sense for your needs.
    Date published: 2017-07-29
    Rated 5 out of 5 by from Refractor + High Quality Glass = good So, if you just want a starter scope, this probably isn't the best choice. That is, you can buy a packaged Celestron or Meade, with the mount (tripod) and decent enough stuff to take a look at the moon from your back yard, for less money. Also, for beginners, research first what you want to look at (planetary? Star clusters?), then decide a budget, and buy the best scope, mount, and eyepieces, after you research. If you don't, you won't be happy with your purchase, and you'll likely just have to spend more or give up like a lot of people do. There's lots of places to do research - I used CloudyNights. For me:� I wanted a really good refractor-type scope, that was larger than the small 80mm, not too expensive, and easily portable for use with our truck camper in the middle of Utah. This amazing scope has super-high quality glass, comes with a nice case, and is really wonderful for the price.� I'm sure the 120mm is a better scope, but I couldn't justify the extra $1K.� The mirror accepts either 2" or 1.25" eyepieces, offering some nice flexibility. The case is nice enough, as are the rings and finder (although I don't really use the finder any longer). Small negative is, the dew shield doesn't come off, making the telescope 4-5" longer than it needs to be in transport. Also, larger negative, the two eyepiece that come with it are not very good, and really not the appropriate focal length anyway. The 5mm will probably never get used in the city, and the 20mm is only good for looking at the entire moon. Expect to buy yourself another $5-600 in eyepieces.� Finally, do not scrimp on the mount. If you do, the telescope will be vibrating and bouncing, the entire time you're trying to focus... making that about impossible. The Bresser Exos is (hopefully) a decent mount under $500. The Vixen StarGuy mount� was awful and I returned it.
    Date published: 2018-01-09
    Rated 4 out of 5 by from Nice portable refractor I bought this telescope to travel with as my Sky Watcher 12 inch dobsonian is too big for travling. It comes with a nice case which is a plus. Although I have only used it once because of rain and cloudy skies I am pleased with the views of the planets. This scope is well made and a nice addition to my telescope collection.
    Date published: 2015-12-30
    Rated 5 out of 5 by from Great scope! I bought this scope to attach to the Sky-Watcher mount and it works great! Views of the planets, moon, and double stars are nice and sharp. The lenses are also pretty good.
    Date published: 2018-05-20
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