Telescopes & Astronomy Equipment on Sale
Telescopes and astronomy equipment on sale give you the opportunity to acquire high-performance instruments at reduced prices, perfect for exploring the night sky. Whether you are an experienced enthusiast or an amateur looking to expand your setup, these deals make astronomy more accessible.
You’ll find telescopes, eyepieces, filters, and accessories suitable for various types of observation, from planets to deep-sky objects. Sales offer the chance to try new models or upgrade your existing setup without compromising quality, all at a good value. We also have overstock sales of astronomy equipment at reduced prices.
This page is regularly updated to provide the best prices on astronomy equipment. Whether your goal is to introduce others to astronomy or enhance your personal observations, these promotions make it easier to access reliable, high-quality instruments. Explore our offers and discover tools that will enrich your observing sessions while staying within your budget. You can also discover our secondhand and used astronomy equipment or open boxes of astronomy equipment.
William Optics Longer Adjusting Adapter for FLAT68III, FLAT7A (AD-M80-45-M48)
William OpticsWilliam Optics Longer Adjusting Adapter for FLAT68III, FLAT7A This adjustable adapter offers a convenient, efficient way to upgrade your WO diagona...
View full detailsWilliam Optics M48 Push-in Nosepiece for WO 2" Diagonals (WD-DIG2A)
William OpticsWilliam Optics M48 Push-in Nosepiece for WO 2" Diagonals Special Reduced Price ! Take advantage of this high quality adapter nose piece for almost...
View full detailsWilliam Optics Gran Turismo 71 Triplet APO f/5.9 (A-F71GTII)
William OpticsWilliam Optics Gran Turismo 71 Triplet APO f/5.9 Technical Specifications Aperture 71mm Focal Length 419mm Focal Ratio f/5.9 Camera...
View full detailsWilliam Optics Fluorostar 156 with 3.7" Rack & Pinion Focuser
William OpticsWilliam Optics Fluorostar 156 A premium apochromatic refractor designed for both avid stargazers and serious astrophotographers. This telescope fe...
View full detailsWilliam Optics Ultra-Cat 131 (T-C-131BR)
William OpticsWilliam Optics Ultra-Cat 131 The William Optics Ultra-Cat 131 is the flagship of the Ultra-Cat series, representing the pinnacle of wide-field astr...
View full detailsWilliam Optics RedCat 71 f/4.9 APO with WIFD (T-C-71RDII)
William OpticsWilliam Optics RedCat 71 f/4.9 APO with WIFD The RedCat series is one of the most popular lines of compact refractors on the market and it is easy ...
View full detailsWilliam Optics Saddle Vixen Style Mounting Base (BAFM-ST001)
William Optics5.0 / 5.0
1 Review
William Optics Saddle Vixen Style Mounting Base In the Box William Optics Saddle Vixen Style Mounting Base Two Mounting Screws Warranty &...
View full detailsWilliam Optics Micro 4/3 48mm T mount for Olympus - Space Gray (TM-MFT-M48)
William Optics5.0 / 5.0
1 Review
William Optics Micro 4/3 48mm T mount for Olympus - Space Gray In the Box William Optics Micro 4/3 48mm T mount for Olympus - Space Gray (WO-YE...
View full detailsWilliam Optics Mighty-Cat 71 (T-MC-71RD)
William OpticsWilliam Optics Mighty-Cat 71 The William Optics Mighty Cat 71 is a groundbreaking 71mm apochromatic astrograph engineered to redefine ultra-fast de...
View full detailsWilliam Optics Saddle Plate for Vixen-style Dovetail Plate - 90mm (M-SP90RC-RD)
William OpticsWilliam Optics Saddle Plate for Vixen-style Dovetail Plate Weight:230g This William Optics saddle plate is designed to accept Vixen-style dovetail...
View full detailsWilliam Optics Red Dot finder Kit with Vixen Style Mounting Base (M-RDF-P-VB)
William Optics4.0 / 5.0
1 Review
William Optics Red dot finder Kit with Vixen Style Mounting Base This very practical Red Dot Finder (R.D.F.) comes with a handy, quick -release bra...
View full detailsWilliam Optics Pleiades 68 APO F/3.8 WIFD (T-P-68BU)
William OpticsWilliam Optics Pleiades 68 APO F/3.8 WIFD Pleiades 68, 7-element imaging APO, F/3.8 WIFD. Comes with soft carry bag, dovetail, handle bar, M48 and ...
View full detailsWilliam Optics SCT to 1.25" RotoLock Visual Back Adapter (F-ROTO-A2-125-SCT-TA)
William OpticsWilliam Optics SCT to 1.25" RotoLock Visual Back Adapter The new RotoLock series of adapters from William Optics may well set the "gold' standard ...
View full detailsWilliam Optics Spacecat 51 WIFD (L-RC51SGIII)
William OpticsWilliam Optics Spacecat 51 WIFD Experience the Elegance of the Universe with the William Optics Spacecat 51 WIFD Telescope Unlock the secrets of t...
View full detailsWilliam Optics Redcat 51 WIFD F/4.9 Petzval Refractor (L-RC51RDIII-WIFD)
William OpticsWilliam Optics Redcat 51 WIFD F/4.9 Petzval Refractor As seen on the RedCat 61 series, the patented William Optics Internal Focus Design (WIFD) mak...
View full detailsWilliam Optics ZenithStar 61II Doublet f/5.9
William Optics5.0 / 5.0
1 Review
William Optics ZenithStar 61II Doublet APO f/5.9 Zenithstar 61 APO Photo Performance by Jerry Huang Technical Specifications Focal Length:...
View full detailsWilliam Optics M48 Filter Adapters for Cat Eyes Binoculars (AD-2X42-M48)
William OpticsWilliam Optics M48 Filter Adapters for Cat Eyes Binoculars The M48 Filter Adapter allows standard 2-inch astronomical filters (M48 × 0.75 thread) t...
View full detailsWilliam Optics Pier Mount 90 (YG-PM-90R)
William OpticsWilliam Optics Pier Mount 90 The Pier Mount 90 is a heavy-duty aluminum pier designed to provide a very stable, vibration-resistant base for astron...
View full detailsWilliam Optics Red Dot finder Kit - USED (M-RDF-P-VB-U)
William OpticsWilliam Optics Red dot finder Kit - USED This very practical Red Dot Finder (R.D.F.) comes with a handy, quick -release bracket included in the pri...
View full detailsWilliam Optics Slide-Base 50mm Guiding Rings (GR50II)
William OpticsWilliam Optics Slide-Base 50mm Guiding Rings Install your 50mm William Optics Guide Scope or Finder scope on your slide handle with the William Opt...
View full detailsWilliam Optics Pleiades 111 APO F/4.8 WIFD (T-P-111BU)
William OpticsWilliam Optics Pleiades 111 APO F/4.8 WIFD Pleiades 111, 7-element imaging APO, F/4.8 WIDF. Comes with soft carry bag, dovetail, handle bar, M48 an...
View full detailsWilliam Optics MiniCat 51 f/3.5 WIFD (T-C-MINI-RD)
William OpticsWilliam Optics MiniCat 51 f/3.5 WIFD Designed for photography enthusiasts who love wide-angle views. Its standout feature is an ultra-bright f/3.5 ...
View full detailsWilliam Optics ZenithStar 81 Doublet WIFD APO f/6.9
William Optics5.0 / 5.0
1 Review
William Optics ZenithStar 81 Doublet APO f/6.9 A premium refractor telescope that offers unparalleled optical precision with its innovative Interna...
View full detailsWilliam Optics ZWO EAF Mounting Bracket for WIFD System
William OpticsWilliam Optics ZWO EAF Mounting Bracket for WIFD System Compatibility Telescope Focuser: All of WO focuser with modular focusing mechanism WIFD f...
View full detailsWilliam Optics Riser Block for 51mm Ring (M-BK51-BL)
William OpticsWilliam Optics Riser Block for 51mm Ring Riser block for redcat 51 ring. Rises the telescope of 20mm. Fits Cat 51, MIniCat, and Z-61 telescope ring...
View full detailsWilliam Optics V Series 290mm Dovetail Plate (M-PV-LII-RD)
William OpticsWilliam Optics V Series Dovetail Plate William Optics' new Dovetail Plate expands your options: you can now choose a fully-anodized WO product to m...
View full detailsWilliam Optics Super High Precision COPPER T-Mount for Canon EOS Full Frame (YE-TR-BR48-C)
William OpticsWilliam Optics Super High Precision COPPER T-Mount for Canon EOS Full Frame T-mount for EOS DSLR camera copper version. Made from high quality copp...
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William Optics Slide-Base 50mm Guiding Rings with Adjustment Screws (M-GR50SL)
William Optics Slide-Base 50mm Guiding Rings with Adjustment Screws (M-GR50SL)
William OpticsWilliam Optics Slide-base 50mm Guiding Rings with Adjustment Screws Weight:260g In the Box William Optics Slide-Base 50mm Guiding Rings 6 x Adju...
View full detailsWilliam Optics Slide-Base UniGuide 32mm Scope
William OpticsWilliam Optics Slide-Base UniGuide 32mm Scope Enhance your astrophotography setup with the William Optics UniGuide 32mm f/3.75, a compact and versa...
View full detailsWilliam Optics UniGuide 50mm Slide-Base Guide Scope
William OpticsWilliam Optics UniGuide 50mm Slide-Base Guide Scope Elevate your astrophotography with the William Optics UniGuide 50mm f/4.0, designed for precisi...
View full detailsWilliam Optics Ultra-Cat 56 (T-C-56BR)
William OpticsWilliam Optics Ultra-Cat 56 The Ultra-Cat 56 is a high-performance 56mm apochromatic refractor, engineered for astrophotographers who demand except...
View full detailsZWO ASI120MM Mini Mono Camera - OPEN BOX (ASI120MINI-O)
ZWOZWO ASI120MM Mini - OPEN BOX The box has been opened, but the camera itself is brand new and has never been used. The ZWO ASI120MM Mini camera int...
View full detailsDwarfLab DWARF Mini Smart Telescope
DwarfLab5.0 / 5.0
8 Reviews
DwarfLab DWARF Mini Smart Telescope Meet the DWARF mini: Ultra-Portable. Pro Performance. The DWARF mini redefines portability in a smart telescope...
View full detailsDwarfLab DWARF III Smart Telescope
DwarfLab4.91 / 5.0
11 Reviews
DwarfLab DWARF III Smart Telescope * No tripod is included * Introducing DWARF 3, the world's most portable and all-round smart telescope. With its...
View full detailsZWO Off-Axis Guider Large - OPEN BOX - Cosmetic Damage (OAG-L-O)
ZWOZWO Off-Axis Guider - Large - OPEN BOX Cosmetic damage (see pictures) OAG-L is the latest iteration of M68 OAG with a larger prism size of 12*12mm....
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