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Explore Scientific

Explore Scientific 102mm f/7 Air-Spaced Triplet ED Apochromatic Refractor Telescope

    • Based on 11 reviews
Condition: New
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$1,199.99 Why this price?

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Availability: In Stock.
Fulfilled by EXPLORE SCIENTIFIC
Arrives May 25 – May 26
Order within 20 hours and 17 minutes
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Features

  • Focal Length 714mm
  • Focal Ratio f/7
  • Magnitude 12.5
  • Resolution 1.14 arcsec

Brand: Explore Scientific


Optical Tube Length: 23.75 Inches


Eye Piece Lens Description: Plossl


Objective Lens Diameter: 102 Millimeters


Product Dimensions: 30.4"D x 10.7"W x 7.9"H


Focus Type: rack-and-pinion


Finderscope: Reflex


Item Weight: 12 Pounds


Lens Coating Description: Multi-Coated


Optical Tube Length: 23.75 Inches


Eye Piece Lens Description: Plossl


Objective Lens Diameter: 102 Millimeters


Focus Type: rack-and-pinion


Finderscope: Reflex


Lens Coating Description: Multi-Coated


Product Dimensions: 30.4"D x 10.7"W x 7.9"H


Item Weight: 12 Pounds


Brand: Explore Scientific


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: May 25 – May 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Excellent scope for good price!!
I have several types of scopes. Several of those are refractor telescopes. This triplet is not the best on the market, however for the price this thing is exactly what you want. I have absolutely no chromatic aberration in stars and moon. The galaxies are crisp, the nebulas have full color range inside your prime focus. THE ONLY things that sets this scope a small amount lower in rank, in my opinion, is the #1 the focuser isn’t incredibly easy to hit the fine tune you may need. There is a bit of slop at the finest focus point causing me to have to back and forth a little to hit the spot. #2 the tube at the focused is mounted with three screw type fasteners. The tube itself is the type with an angled surface that is supposed to pull in right when tightening the screws to mount it. This does not seat properly and causes a slight out of shape star. This is fixed by loosening and pressing in until flush while tightening. Not a big deal but a little annoying to have to figure it out. #3 even with everything perfect in the image train, the airy disc pattern has a little misshape on one edge. Maybe 20degrees at bottom of circle. I think the collimation and or glass isn’t exactly perfect which is kind of expected at this price range and ultimately does not effect the overall image at all that is noticeable. Well worth every dime and quite good compared to others of the same design. ... show more
Reviewed in the United States on May 2, 2023 by Heath
    • Expensive
Sti hav us it, been busy
Reviewed in the United States on August 8, 2023 by JAM
    • Had to Immediately return!
When I unboxed it i found one of the ring's bolt (back one) was not tightened and would not tighten as it was not in line with hole and was stripped (someone at factory must have tried to force it and gave up). So much for quality control. Did return with Amazon and immediately ordered another one. Will give full review when scope gets here next week. ... show more
Reviewed in the United States on April 20, 2023 by Bill Davidson
    • Nice APO Refractor
I purchased this APO refractor when it was on sale. It was the best price I could find anywhere and it is a nice telescope.
Reviewed in the United States on June 10, 2023 by Russell H. Cashin
    • Initial Experience with ES 102 Triplet Apo
Review Image by MSL MSL
I bought the ES 102 triplet apo primarily for a planned venture into astrophotography with the thought of eventually purchasing a larger scope. I also wanted the experience of enjoying some visual observations. I have a lifetime of photographic experience but zero with telescopes. I wanted a high quality, full featured instrument that I could use to learn the basics of astrophotography. Along with the ES 102, I purchased a Celestron AVX mount. The ES arrived quickly and was well packaged. It was considerably more substantial than what I expected from reading reviews and viewing a few on-line videos. There are also quite few initial items that are required but not included with the telescope itself. These include a finder scope, at least one eyepiece, T-adapter and T-ring, neutral density “moon filter” and extension tube. The ES 102 comes with a 1.5” long extension ring which must be installed otherwise even with the included 2” diagonal, the optical path is too short for even visual observing. The ring was also necessary to achieve enough back focus with a T-adapter and extension tube to enable focus at my camera’s sensor plane. It took a day or so of experimenting through a window just to achieve proof of concept both visually and photographically. I was lucky that we had a few clear nights so I took the plunge and brought the scope outside to view a beautiful fall full moon. My crude attempt at aligning the finder scope with the main scope was surprisingly successful, enough so that the moon dramatically appeared in the near center of my 32 mm eyepiece. I removed the diagonal and attached my camera, a Canon 5DSR. After a few camera adjustments I was able to acquire some images and upload them into Bridge, Camera Raw and Photoshop. I’ve attached an image that I acquired after about an hour of camera fiddling. What I didn’t notice were any of the issues that I had anticipated such as difficulty focusing or instability of the image even with a somewhat heavy camera. However, I did notice some backlash with the fine focus knob of the two speed focuser. I improved things a bit by tightening the focuser tension thumbscrew. Overall, I was very satisfied with the results with the ES 102 on my first night out and without even completely reading through manuals for both the telescope and mount. However, with my truly zero telescope background, I’m not in a position to offer any technical pronouncements. All I can say is so far, so good. ... show more
Reviewed in the United States on October 16, 2016 by MSL MSL
    • Great Scope
Love this scope! I built an adruino focuser as the focus window is pretty small. I had to use both extension tubes and a field flattener for my DSLR. Using the focuser I can make micro adjustments and get it just right. The only negative could be I have been up late almost every night since it arrived. ... show more
Reviewed in the United States on December 6, 2018 by Jeff

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