Products

Explore and "color in" the amazing world of minerals and crystals... readers and rockhounds of all ages and skill levels will love this book! Learn...

Explore and "color in" the amazing world of minerals and crystals... readers and rockhounds of all ages and skill levels will love this book! Learn...

Allows Celestron computerized telescopes (CPC, CGE, NexStar, Advanced Series) to be connected to a RS-232 serial port for computer control. A USB-t...

Counterweights Not Required Only 3.4kg weight ±2.5arcsec PE Capacity 13.5kg (max 18kg) Strain Wave Gear (Harmonic Drive) ...

Use 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 ...

35.3mm 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...

This adapter gives your Starizona SCT Corrector v1 SCT Threads.   Thread Type: SCT Length: 9mm length

Updated, more robust design! This bracket will fit the existing finderscope mounting holes on SCT telescopes.  It fits common finderscope style fee...

Description The secondary mirror cover can be used to cover the rear side of the secondary mirror. This considerably reduces the cooling of the se...

Description The secondary mirror cover can be used to cover the rear side of the secondary mirror. This considerably reduces the cooling of the se...

Description The secondary mirror cover can be used to cover the rear side of the secondary mirror. This considerably reduces the cooling of the se...

Description The secondary mirror cover can be used to cover the rear side of the secondary mirror. This considerably reduces the cooling of the se...

Description The secondary mirror cover can be used to cover the rear side of the secondary mirror. This considerably reduces the cooling of the se...

Description The secondary mirror cover can be used to cover the rear side of the secondary mirror. This considerably reduces the cooling of the se...

CNC machined secondary spider made of aluminum (EN AW-6061), black matt anodized, suitable for 8" TS-Optics GSO Photon This secondary spider is ma...

CNC machined secondary spider made of aluminum (EN AW-6061), black matte anodized, suitable for 10" TS-Optics GSO Photon This secondary spider is m...

CNC machined secondary spider made of aluminum (EN AW-6061), black matte anodized, suitable for Skywatcher 150 P/PDS/Quattro This secondary spider ...

CNC machined secondary spider made of aluminum (EN AW-6061), black matte anodized, suitable for Skywatcher 200 PDS/Quattro This secondary spider is...

CNC machined secondary spider made of aluminum (EN AW-6061), black matte anodized, suitable for Skywatcher 250 PDS/Quattro This secondary spider is...

CNC machined secondary spider made of aluminum (EN AW-6061), black matt anodized, suitable for TS-Optics GSO Photon 6" This secondary spider is ma...

AstroLevel, the ultimate accessory for your ZWO SeeStar S50 smart telescope. Designed to seamlessly connect to your SeeStar's tripod, AstroLeve...

Limited Quantity: Due to high demand and limited availability, orders will be fulfilled on a first-in, first-out basis. This means that the earlier...

The 0.84x reducer can bring Sharpstar 50EDPH's focal ratio down to F4.6. This is a standard reducer with field flattening capabilities as well. A...

V2 model with new tube ring and foot design.  This compact 50mm f/5.5 APO refractor telescope has triplet air-spaced APO optics, including two piec...

Finally, an affordable meter for measuring sky brightness for astronomers!  The "Sky Quality Meter" measures the brightness of the night sky in mag...

Includes: Sky-Watcher 6-inch f/8 Dobsonian OTA. Rocker Base. 6X30 Finder and Bracket. 25 mm Plossl 1.25-inch Eyepiece. 10 mm Plossl 1.25-inch Eyep...

  Large 300mm aperture delivers stunning viewing experience Innovative collapsible design that retains collimation 1840x more light-gathering powe...

34mm fully illuminated field but can handle full frame as well 95mm back-focus (55mm when back focus spacer and M48 ring installed) Drops f/ratio...

36mm fully illuminated field, compatible with both APS-C and full frame sensors 90mm back-focus (55mm when back focus spacer and M48 ring install...

0.9x thread-on reducer/corrector produces a flat field across the entire image while shortening exposure time by 24%. Optimized for Evolux 62mm re...

0.9x thread-on reducer/corrector produces a flat field across the entire image while shortening exposure time by 24%. Optimized for Evolux 82mm re...

30-pound payload capacity handles most mid-range OTAs German equatorial/Alt-Az/dual-OTA mode Permanent periodic error correction (PPEC) Belt drive...

Works on AZ-EQ6 mounts 11lbs

  44-pound payload capacity handles a large variety of OTAs German equatorial/Alt-Az/dual-OTA mode Permanent periodic error correction (PPEC) +/- ...

Multi-purpose alt-azimuth mount 11-pound payload capacity Built-in Wi-Fi Spring loaded worm gears SynScan GoTo telescope mount with 42,900+ objec...

  Affordable, large 200mm aperture delivers stunning viewing experience 78% brighter than 150mm model Patented tension control handle allows for p...

  Affordable, large 250mm aperture delivers stunning viewing experience 56% brighter than the Classic 200P Dobsonian Patented tension control hand...

This PETG 3D printed altitude knob replaces the original Sky-Watcher EQ6 altitude knob with a larger easier to grab alternative.  To install simply...

Equatorial GoTo mount  22-pound payload capacity  0- 90° latitude range  SynScan Go To telescope mount with 42,900+ object database  Built-in WiF...

The Sky-Watcher Pier Extension is designed to raise the EQ6 or EQ6-R mount 8.4" from the tripod to provide extra height for more comfortable observ...

An Astrophotography Powerhouse The EQ6-R boasts a number of features to aid astrophotographers. The built in ST-4 Autoguider port turns this mount...

Because these mounts are observatory class we are offering them in two configurations. For the field imager both mounts include the mount head, two...

Because these mounts are observatory class we are offering them in two configurations. For the field imager both mounts include the mount head, two...

Doublet apochromatic optical design Two-element, air-spaced optical assembly minimizes false color 100mm aperture, 900mm focal length, f/9 focal r...

Doublet apochromatic optical design Two-element, air-spaced optical assembly minimizes false color 120mm aperture, 900mm focal length, f/7.5 focal...

Doublet apochromatic optical design Two-element, air-spaced optical assembly minimizes false color 80mm aperture, 600mm focal length, f/7.5 focal ...

Large 200mm aperture delivers stunning viewing experience Innovative collapsible design that retains collimation 816x more light-gathering power t...