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H-α (hydrogen-alpha) at 656 nm (nanometers) is deep red in color and the most popular narrowband filter. Hydrogen is ubiquitous in the cosmos and i...

If you want the look of Hubble Space Telescope (HST) images, such as the famous “Pillars of Creation” (the Eagle Nebula, Messier 16), then the next...

In perfect condition, used Baader H-alpha / O-III / S-II Ultra-Narrowband (Narrowband) filter set - Premium Grade 3.5 / 4 nm half width (to harmo...

In perfect condition, open box Baader H-alpha / O-III / S-II Narrowband Filter Set - Precision Grade 6.5 nm FWHM, recommended for optical systems...

In perfect condition, open box Filter size 31 mm - round, unmounted - filter thickness 2 mm Set of L-R-G-B filters High-quality anti-reflective ...

Like new! Baader T-Ring to connect Nikon DSLR cameras onto the Astro T-2 system Results in the standard exact distance of 55.0mm from the front fac...

11" (279.4mm) Schmidt-Cassegrain Optical Tube Assembly 1593x Light Gathering Power for Bright Deep-Sky Views 0.42 Arc Second Dawes Limit Resolutio...

8" (203.2mm) Schmidt-Cassegrain Optical Tube Assembly 2032mm Focal Length at f/10 Computerized Dual Fork Arm Alt-Azimuth Mount Internal 16-Channel...

235mm (9.25") Schmidt-Cassegrain Optical Tube Fully Computerized Dual Fork Arm Alt-Azimuth Mount Internal 16-Channel GPS for automatic alignment d...

11" (279.4mm) EdgeHD Optical Design 2800mm Focal Length at f/10 42mm Image Circle for Full-Frame Sensors Computerized Dual Fork Arm Alt-Az Mount I...

8" (203.2mm) EdgeHD Optical Design 2032mm Focal Length at f/10 42mm Optimized Image Circle for Full-Frame Sensors Computerized Dual Fork Arm Alt-A...

235mm (9.25") EdgeHD Aplanatic Schmidt-Cassegrain Optics 2350mm Focal Length at f/10 Optimized 42mm Image Circle for Full-Frame Sensors StarBright...

This used kit comes with: Nexstar 6SE telescope, mount and tripod Celestron Padded carrying case Celestron 2" Dieletric diagonal with twist lock C...

Like new!Features Portable power pack for your computerized Celestron telescope using Lithium-Iron Phosphate (LiFePO4) chemistry Powers your telesc...

In fair conditionFeatures This Celestron T-Ring attaches to Canon EOS DSLR and SLR camera bodies Sturdy bayonet flange locks in place just like a l...

Like new!Features X-Cel LX eyepieces, optimized for planetary viewing, offer a 60° field of view through a six-element fully multi-coated lens syst...

In good condition, comes with BF10, one CEMAX 25mm eyepiece, one 18mm CEMAX eyepiece, one CEMAX 2x barlow and the original hard case. <0.7 Angs...

This telescope is a return, being returned due to its size. It was assembled, the client found it too big, then disassembled and returned. Designe...

ED127 telescope (good condition) 3" 0.7x reducer from Explore Scientific (brand new) 2" Field flattener from Explore Scientific (good condition) 6...

The Lunt LS40Tha is a dedicated hydrogen-alpha solar telescope that provides exceptional resolution and contrast for solar observation and imaging...

Every astronomer should have at his disposition a detailed map of our only natural satellite: the Moon. Our map is based on thousands of images ...

In good condition. Comes with original packaging Works with OTA dew shields up to 7-5/8" (194mm) Illumination up to 170mm

High-resolution monochrome sensor for solar imaging Optimized for full-disk and high-magnification solar capture Fast USB interface for high frame...

Monochrome large-format sensor (IMX428 MAX) Cooled astrophotography camera Optimized for solar and high-resolution imaging Low read noise with hig...