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Used, in good condition. Comes in original packaging.

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...

Celestron’s signature orange-tube telescope combines advanced features and excellent optics in one easy-to-use system, the NexStar 4SE. It’s the pe...

Celestron’s signature orange-tube telescope combines advanced features and excellent optics in one easy-to-use system, the NexStar 5SE. It’s the pe...

Celestron’s signature orange-tube telescope combines advanced features and excellent optics in one easy-to-use system, the NexStar 6SE. It’s the pe...

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

Large 8" Schmidt-Cassegrain optics offers impressive light-gathering power, revealing sharp, detailed views of the Moon and planets, ...

In good condition. Adapters show sign of use.  Comes with all original adapters and in the original box. Features Most accurate way to guide – im...

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, and the original hard case. Does not come with tripod in image. <0.7 Angstroms

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

QHY5III485C uses Sony’s new IMX485, back-illuminated, 8.4 megapixel color CMOS sensor with an array of 3864 x 2180 pixels at 2.9um. With USB 3.0 in...

Used. Come with hard case, and all required cables.

The Sky-Watcher Classic Dobsonian Telescope 153mm/1200mm (6") has a "paraboloidal" primary mirror to eliminate spherical aberration and a four-arm,...