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Reducer Lens .7x - Edge HD 1400
Celestron$839.00The EdgeHD .7x Reducer Makes Your EdgeHD 1100 One Full F-Stop Faster Than f/10, Reducing Your Exposure Time by One-Half to Capture the Same Bright...
View full details$839.00 -
Reducer Lens .7x - Edge HD 800
Celestron$409.00The EdgeHD .7x Reducer Makes Your EdgeHD 800 One Full F-Stop Faster Than f/10, Reducing Your Exposure Time by One-Half to Capture the Same Brightn...
View full details$409.00 -
Reducer Lens .7X - Edge HD 925
Celestron$429.00Celestron’s new EdgeHD reducers feature a custom 4-element optical design engineered to maintain the flat-field performance of our award winning Ed...
View full details$429.00 -
In Stock
Regal M2 100ED
Celestron$1,079.95The Regal M2 spotting scope series is the next generation of our top-performing Regal F-ED spotting scopes. Day or night, the Regal M2 is optimized...
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Ricoh Pentax 6.5x21 Papilio Binoculars
Pentax$129.00Named for the Latin word for butterfly, PENTAX Papilio 6.5x21 binoculars are the perfect choice for insect observation in the field and in museums ...
View full details$129.00In Stock -
In Stock
Ricoh Pentax 8.5x21 Papilio Binoculars
Pentax$149.00Named for the Latin word for butterfly, PENTAX Papilio 8.5x21 binoculars are the perfect choice for insect observation in the field and in museums ...
View full details$149.00In Stock -
Rigel QuikFinder
Rigel Systems$49.95One Tenth the size and weight of the competition's "reflex" sight, makes aiming your telescope easy with its wide-open right-side-up view. Projects...
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Road Atlas for the Total Solar Eclipse of 2024 Color Edition book
Book$19.99On Monday, April 8, 2024, a total eclipse of the Sun will be visible from parts of the United States and Canada. Although a partial eclipse will b...
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Rock Collecting for Kids: An Introduction to Geology Book
Book$12.95Rock collecting is simple and fun with this children’s book that includes an introduction to geology, an identification guide to rocks and minerals...
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In Stock
Rocks from Space
Mountain Press$34.95Author: O. Richard NortonPaperback: 444 pagesThis popular nontechnical introduction to meteorites, asteroids, comets, and impact craters is now eve...
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Rocks, Minerals & Crystals: A Coloring & Collecting Book
Book$8.95Explore and "color in" the amazing world of minerals and crystals... readers and rockhounds of all ages and skill levels will love this book! Learn...
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RS-232 Cable - Celestron Goto Telescopes
Celestron$22.95Allows Celestron computerized telescopes (CPC, CGE, NexStar, Advanced Series) to be connected to a RS-232 serial port for computer control. A USB-t...
View full details$22.95 -
RST-135E Weightless Mount
Rainbow Astro$5,495.00Counterweights Not Required Only 3.4kg weight ±2.5arcsec PE Capacity 13.5kg (max 18kg) Strain Wave Gear (Harmonic Drive) ...
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SCT - 2" Adapter
Starizona$29.95Use this adapter to attach accessories with standard SCT female threads (such as a focal reducer) to a 2" focuser or visual back. This adapter has ...
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SCT 2" Visual Back w/ Brass Clamp Ring
starizona$24.95Details: - 55mm Long - SCT Female Threads - Takes 2" eyepieces and diagonals
$24.95 -
In Stock
SCT Corrector - Adapter for 55mm Backfocus
starizona$40.0035.3mm T-to-T spacer (M42 female to M42 male). This adapter takes up 35.3mm of the Starizona SCT Corrector's 90.3mm back focus. Leaving 55mm of ba...
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SCT Corrector v1 to SCT Threads
Starizona$65.00This adapter gives your Starizona SCT Corrector v1 SCT Threads. Thread Type: SCT Length: 9mm length
$65.00 -
In Stock
SCT Mounting Bracket for Mini Guidescopes and ASIAir
Starizona$12.95This bracket will fit the existing finderscope mounting holes on SCT telescopes. It fits common finderscope style feet, so you can mount a finders...
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Secondary Mirror Spider TS200, CNC machined
Backyard Universe$219.00CNC machined secondary spider made of aluminum (EN AW-6061), black matt anodized, suitable for 8" TS-Optics GSO Photon This secondary spider is ma...
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Secondary Spider for SkyWatcher 150, CNC machined
Backyard Universe$179.00CNC machined secondary spider made of aluminum (EN AW-6061), black matte anodized, suitable for Skywatcher 150 P/PDS/Quattro This secondary spider ...
View full details$179.00In Stock -
In Stock
Secondary Spider for SkyWatcher 200, CNC machined
Backyard Universe$219.00CNC machined secondary spider made of aluminum (EN AW-6061), black matte anodized, suitable for Skywatcher 200 PDS/Quattro This secondary spider is...
View full details$219.00In Stock -
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Secondary Spider for SkyWatcher 250, CNC machined
Backyard Universe$279.00CNC machined secondary spider made of aluminum (EN AW-6061), black matte anodized, suitable for Skywatcher 250 PDS/Quattro This secondary spider is...
View full details$279.00In Stock -
Secondary Spider TS150, CNC Machined Metal Tube ID175mm
Backyard Universe$169.00CNC machined secondary spider made of aluminum (EN AW-6061), black matt anodized, suitable for TS-Optics GSO Photon 6" This secondary spider is ma...
View full details$169.00 -
In Stock
SeeStar AstroLevel
Starizona$37.95AstroLevel, the ultimate accessory for your ZWO SeeStar S50 smart telescope. Designed to seamlessly connect to your SeeStar's tripod, AstroLeve...
View full details$37.95In Stock