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The 1.0x flattener does not change the telescope's focal ratio itself. After connecting with the Askar 140APO, it still maintained a focal ratio ...

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.

Baader Planetarium has introduced the world's finest UV/IR cut filter. This filter is a must for all digital imaging with Digital Cameras, CCD Came...

High-quality quintuplet air-spaced SD glass Petzval Astrograph.   Product introduction ...

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

This M42-to-M48 Step Ring features a built-in lip that acts as a mechanical backstop, preventing over-threading into larger M48 connections. Perfec...

This adapter enables you to mount your unmounted 50.8mm filters to 48mm threads. This mount will allow you to use unmounted 50.8mm filters with Sta...

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...

Please Note: A T2 Tilter is included in the package but due to its large size it will be packed separately in another box, not in the camera box.  ...

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...

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...

Specifications Parameters Aperture size 106mm Focal length 509mm Focal ratio f/4.8 Objective lens Quintuplet petzval A...

Our M42-to-M54 Step Ring with Lip adds a stop to keep the ring from threading too far in.  Ideal for using a ZWO CAA with an SCT T-adapter, for exa...

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...

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...

Askar provides a F3.9 full frame reducer for FRA400 Astrograph, further reducing the focal length and thus shortening the exposure time on its orig...

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

Heater ring provides the most efficient heating directly to the corrector lens to prevent the formation of dew Permanently mounts to your existin...

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...

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 ...

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...

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...

OverviewControl your telescope wirelessly from your iOS or Android smartphone or tablet with the free Celestron mobile app with planetarium interfa...

Made of anodized aluminum with female threads.

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

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...