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Made of anodized aluminum.

ASKAR FMA180 objective lens features Triplet air-spaced APO design,includes two pieces of ED (extra-low dispersion) glass, providing excellent corr...

Replacement 2" holder for Quattro focusers that features a brass clamp ring and much tighter inside diameter tolerance to better hold imaging acces...

The iconic saguaro cactus is one of thousands of species of plants growing in the diverse ecosystems found throughout the southwestern deserts. Thi...

Pre-order for Askar 0.75x Reducer for 71F Telescope. More information coming soon!

Accurate balance is necessary for the best telescope performance. Adding heavy accessories such as 2" eyepieces or cameras to a scope requires the ...

This version of the Counterweight Set will not work with the CPC-800. For the correct version, click here.Accurate balance is necessary for the bes...

Standard visual back as included with Celestron SCTs. Adapts 1.25" accessories (such as diagonals, camera adapters, etc.) to the standard SCT threads.

ASI585MC/MM Pro is a new ZWO deep sky camera based on the 4k SONY CMOS sensor with a 1/1.2″ format and 2.9μm pixels. It has a super high sensitivi...

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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...

This part is used to replace the removable lip on the newer model Starizona Nexus 0.75x coma corrector, providing a male M54.5 x 1 thread for a dir...

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...

The ALP-T dual band 3.5nm SII&Hb filter is a dual narrowband filter, which lets the deep red Sulfur-II 672.4nm and the blue Hydrogen-Beta 48...

Extension tube for Wave carbon fiber tripod  7-inch (180mm) length  3.9-inch (100mm) radius  Weighs 2.4 pounds (1.1kg) Carbon Fiber Tripod not inc...

This adapter allows the use of a Feathertouch SCT MicroFocuser on an older Celestron 8" SCT (orange tube and some older black tube models). Include...

Use this sturdy, 3D-printed plastic bracket to attach a standard red-dot type finderscope to the flash hot shoe on top of your Nikon DSLR. The find...

This is the top half of the Celestron 8" SCT counterweight set. Use this if you already have a bottom slidebar kit from Celestron or Losmandy. Incl...

This adapter commonly comes with ZWO's astrophotography cameras that have M54 attachment threads.

Our kit of popular accessories for the ZWO Seestar S50 smart telescope includes a holder for using standard 2" (M48 thread) filters, a magnetic dew...

This version of the Counterweight Set will not work with the CPC-1100. For the correct version, click here. Accurate balance is necessary for the b...

This is the top half of the Celestron CPC-1100 counterweight set. Use this if you already have a bottom slidebar kit from Celestron or Losmandy. In...

The narrow-bandpass OIII filter improves the view of emission and planetary nebulae. The filter works by blocking natural and artificial light poll...

The Azimuth Adjuster Adapter is designed for use on the Twilight Medium Duty or Twilight Heavy Duty tripods.  This adapter also works with the Lig...

130PHQ is a long-focal-ratio, flatfield astrograph newly launched after 107PHQ. Instead of buying extra flatteners, calculating the backfocus of fl...

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...

Antlia OIII Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nmbandpass. As the bandwidth becomes narrower, the 3nm Pro narr...

The popular Sky-Watcher SolarQuest mount is an awesome little sun tracking mount that works perfectly with many solar telescopes, but some telescop...

This double ring set offers improved stability over single camera body mounting rings for using a ZWO camera with a DSLR camera lens.  The ring set...

Antlia SII Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro narr...

Overview f/4 ED coma corrector FPL51 and Schott glass Optimized for Quattro imaging Newtonians Requires 55mm backfocus Delivers stunning wide-fi...

High-strength carbon fiber tripod for Wave mounts  29-inch (747mm) maximum extended length  19.7-inch (500mm) minimum retracted length  44-pound (...

This replacement adapter came with the original Starizona RASA8 Filter Slider converting the bottom M48 to M42 and adding 1mm to the Filter Slider ...

  It's the 2020 edition of Professor Noggin with all new photos! Kids will enjoy transferring their energy to learning about Energy, Motion, and Ga...

ZWO Electronic Filter Wheel (2025 Edition)- 5x1.25" Refined Design with Anti Light-Leak Protection The next-generation ZWO EFW series introduces an...