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This version of the Counterweight Set will only work with the CPC-800. For other Celestron 8" SCTs, click here.Accurate balance is necessary for th...

ZWO adapter: M54 Male to M54 Female, 21mm length 

Antlia OIII EDGE narrowband filter optimizes the FWHM (full width half maximum) to 4.5nm bandpass. The suppression of optical density (OD)5 on unwa...

This adapter threads into the front (telescope side) threads of the SkyWatcher EvoStar ED focal reducer, allowing the reducer to be placed directly...

"I can't find the Sun!" Sounds funny. However, the Sun is tricky to find in a properly filtered telescope, and you don't ever want to chance a dire...

ZWO Holder Ring for ZWO ASI PRO COOLED CAMERAS with appr 78mm diameter. Currently compatible with the following ZWO cameras: ASI1600 Pro, ASI183 P...

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...

Use this adapter to connect a T-ring or T-mount camera to a 2" focuser. Low profile design keeps backfocus short. Threaded for 48mm filters.

42,000 object data base Built-in USB-B 2.0 port for easy control via PC or firmware updates Only compatible with Sky-Watcher SynScan mounts In...

M54-M48-2mm adapter is independently developed by ZWO and mainly used for connecting to 2”EFW and M54 filter drawer. 

M54 Male, to M48 Female, 21mm in length

Antlia H-alpha EDGE narrowband filter optimizes the FWHM (full width half maximum) to 4.5nm bandpass. The suppression of optical density (OD)5 on u...

Additional threaded 2.5-pound bottom counterweight for Starizona counterweight sets (for NexStar GPS and CPC telescopes). Necessary for heavy loads...

The Arizona Recreation Map is a folded map version of the Recreation Guide pages within our Arizona Road & Recreation Atlas. One side provides ...

The Celestron 2” to 1.25” Adapter with Twist-Lock was designed for visual observers who use both 2” and 1.25” eyepieces regularly and need a quick...

The SII/OIII filter that brings Hubble Palette imaging to your color camera. The L-Synergy is Optolong's newest narrowband filter, introduced in 20...

The 0.8x reducer can bring Askar 140APO's focal ratio down to F5.6. This is a standard reducer with field flattening capabilities as well. A shor...

A filter for enchanced H-alpha nebula observations with UV/near IR suppressiong function - especially removing red end spectrum interference. The H...

With the upgrading of electronic astronomical accessories, electronic devices are more and more widely used in astronomical observation and astroph...

Sky-Watcher’s SynScan USB brings older Sky-Watcher mounts into the 21st century, by eliminating the need for outdated serial connections. For thos...

The latest book by noted astronomer David Levy (do-discoverer of the Shoemaker-Levy comet which slammed into Jupiter in 1994. This book, geared tow...

Use this adapter to put a 2" male nosepiece onto the original (non-modular) Starizona Filter Slider to use on anything that accepts a 2" barrel.   ...