Explore Scientific AR102 102mm f/6.5 Doublet Refractor Telescope
SKU: 13744941905

Explore Scientific AR102 102mm f/6.5 Doublet Refractor Telescope

Sale price$135.00 Regular price$150.00
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Description

Explore Scientific AR102 102mm f/6.5 Doublet Refractor TelescopeIf you've been observing with a 60mm or 70mm starter scope and wondering why galaxies and nebulae never look like the photos, aperture is the answer and the Explore Scientific AR102 puts a fully equipped 4 inch refractor with an 8x50 finderscope, 2" dielectric diagonal, and dual speed Crayford focuser in your hands for $300. This air spaced doublet achromat gathers 2. 4x more light than an 80mm scope, turning faint fuzzies into defined structure at

If you've been observing with a 60mm or 70mm starter scope and wondering why galaxies and nebulae never look like the photos, aperture is the answer — and the Explore Scientific AR102 puts a fully equipped 4-inch refractor with an 8x50 finderscope, 2" dielectric diagonal, and dual-speed Crayford focuser in your hands for $300. This air-spaced doublet achromat gathers 2.4x more light than an 80mm scope, turning faint fuzzies into defined structure at the eyepiece.


Key Features
  • 102mm Air-Spaced Crown-and-Flint Doublet – Classic achromatic design with fully multi-coated optics delivers bright, high-contrast views with 1.14 arcsecond resolution and a 12.5 limiting magnitude
  • Fast f/6.5 Focal Ratio – 663mm focal length provides wide-field deep-sky views while still resolving lunar craters and planetary detail at moderate magnifications
  • 2" Dual-Speed Crayford-Style Focuser – Zero-image-shift design with 10:1 fine focus ratio and adjustable tension for smooth, precise focusing at any magnification
  • 8x50 Straight-Through Finderscope Included – High-quality optical finder with 6-point adjustable bracket for quick, accurate star-hopping — no additional purchase needed
  • 99% Reflective 2" Dielectric Diagonal Included – Premium diagonal with brass compression ring maximizes light throughput and contrast right out of the box
  • Lightweight and Portable – 11.5 lbs and 25.5" of tube make this easy to transport to star parties, outreach events, and dark-sky sites
  • Cradle Rings with Carry Handle – Felt-lined rings provide secure mounting and easy balance adjustments, with a built-in handle for safe transport
  • Vixen-Style Dovetail – Compatible with most alt-azimuth and equatorial mounts for flexible setup options

Ideal For
  • Visual observers upgrading from a smaller scope who want a noticeable jump in brightness and detail — the 102mm aperture pulls in nearly twice the light of a 70mm refractor, revealing structure in nebulae, galaxies, and star clusters that smaller scopes can't show
  • Star party and outreach organizers who need a reliable, impressive scope that sets up fast — the included finderscope, diagonal, and Crayford focuser mean you're observing within minutes with no extra accessories to buy
  • Budget-conscious astronomers who want quality optics without paying APO prices — the AR102 delivers sharp, contrast-rich views at a fraction of the cost of an ED or triplet refractor
  • Lunar and planetary observers who enjoy scanning craters, cloud bands, and ring detail at moderate magnifications — the f/6.5 focal ratio strikes a balance between wide-field sweeps and detailed close-up views

Accessories & Compatibility

Want more aperture? The AR127 steps up to 127mm for brighter views and higher resolution, and the AR152 delivers the brightest images in the AR Series with a full 6 inches of aperture. Looking for color-free APO performance? The ED102 Essential Series steps up to an air-spaced triplet with HOYA FCD1 extra-low dispersion glass, eliminating the chromatic aberration inherent in achromatic designs.

Note: No eyepieces are included — the AR102 is designed for observers who want to choose their own. See our recommended eyepieces below.


Recommended Eyepieces

We recommend the Explore Scientific 52° Series Waterproof Eyepieces — each is fully sealed, nitrogen-purged, and built for years of reliable use:

  • 25mm (27x) – Wide-field scanning of the Orion Nebula, Andromeda Galaxy, and Pleiades star cluster with a bright, expansive view
  • 20mm (33x) – A versatile mid-range magnification for exploring galaxies, nebulae, and open clusters with good detail and field of view
  • 10mm (66x) – Sharp planetary views and double-star splitting, with bright, contrast-rich deep-sky detail
  • 4.5mm (147x) – High-power lunar and planetary detail — Saturn's rings, Jupiter's cloud bands, and intricate lunar craters

If you're starting out, the 25mm delivers bright, sweeping views that make deep-sky objects easy to find. Add the 10mm for a versatile mid-high power option, then build from there.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 13744941905

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Melissa Williams
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★★★★★ 4
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Vale is an 8 month pregnant omega working as a waitress at a strip club and a cam girl. She starts to get very creepy vibes from a regular at the club, and her baby daddy ghosted her. She has had an online relationship with a man named Bishop through her cam girl status. One night, bishop was paying to watch her sleep and ansthe creepy regular Andrew break in and watch her sleep he tells vale to come to him at his business now. She flees and finds herself at a large security company with some.hot of alphas who are there to help her. This imegaverse is a little different than I have read, but I am thoroughly enjoying it. Vale is not a traditional omega she was raised by a single beta mom, and the alphas are not normal alphas they have never really loved pack life. But they are ruthless mercenaries. They need her, and she needs them. I love the aspect of the stalker and now the plot twists at the end, so so good. Sometimes, it seemed a little slow and stale mated, but since this a duet, I think It was just her starting to have Vale get to know her alpha suitors. Cliffhanger for sure with this one.
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Reviewed in the United States on September 9, 2024
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Austin & Cambria
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★★★★★ 5
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Format: Kindle
I fell into a false sense of security and really thought this was gearing towards a happy ending. Then I realized there’s no work they don’t punish Andrew. I really liked Vale’s character. I don’t normally read books with pregnancy but going into this knowing she was pregnant made it more enjoyable for me. I loved Bishops devotion to her and her happiness. I also loved that Holt and Mercy couldn’t fight their attraction to her. I love scent matches so very much. I’m so curious to see how this duet will end up. And I need to pay more attention and notice that a book I’m starting is a duet to begin with lol
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Reviewed in the United States on February 21, 2025
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Sarah A
San Leandro, US
★★★★★ 5
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I just knew there was something about Cooper! I’m wondering if he’s about to be included but damn I’m glad he’s at least not a rapist and creepy guy, he just got called on assignment and had to go! This should be interesting! She’s gonna run and then what’s his face is gonna grab her. I’m worried! Wow that was a great book and cliffhanger! Loving this!
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Reviewed in the United States on December 27, 2025
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Ashley Morgan
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ABSOLUTELY A MUST for Omegaverse Girls!!!
I ABSOLUTELY LOVE Jillian West and her books!!! I’m so happy I already bought book two and now I have to buy the others for the Assurance Security series!! Not gonna lie Val kind of annoyed me at the beginning but she grew on me!! Her men are chef’s kisses!!! Holt annoys me some but I can let it slide. I already bought part two so I’m going to be reading that in between work phone calls!!!! DON’T TELL MY BOSS 😂😂😂😂
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Carmen Alicea
Grantham, US
★★★★★ 4
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Reviewed in the United States on December 18, 2025

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