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This adapter converts T-threads (M42) to C-threads (1.0"). It has female T-threads on the bottom and male C-threads on the top. The adapter adds 5....

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...

Secure and comfortable grip for Askar SQA refractor telescopes. This handle bar attaches to Askar SQA models (except SQA55), providing stable contr...

Made of anodized aluminum.

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...

For imagers who want easier filter changes or need larger camera threads, the Starizona HyperStar Filter Slider Upgrade is available as a separate ...

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...

Aperture size 50mm Focal length 190mm  Focal ratio f/3.8 Objective lens Quadruplet petzval APO（including one piece of SD g...

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...

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 Gas...

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

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...

Unleash the power of your smartphone to take you on a guided tour of the night sky—no telescope experience required. Award-winning and patented...

The ideal storage and transport solution for a wide range of tripods and their accessory trays with internal straps for a secure fit. Ultra-durabl...