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Mid-range high power eyepieces like the 6.5mm are instrumental when transitioning through magnifications to observe an object until it is best s...

SkyMaster Pro binoculars are the ideal choice for amateur astronomers or anyone that observes at great distances. Compared to lower-priced large a...

Use this adapter to attach a ZWO PE200 pier extension to a Skywatcher EQ6 tripod.  It works with either a standard EQ6 white tripod or the black EQ...

The 7-element, Nagler Type 6 design is based on the original patented Nagler design. This new 7-element design update for the short focal length Na...

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

The 10mm Ethos delivers: 100° apparent field (50% larger in area than 82° Naglers), comfortable eye-relief, (accepts DIOPTRX eyesight astigmatism c...

ASI294MC ASI294 is the first camera in the world that equiped with SONY latest sensor IMX294CJK. Diagonal 21.63 mm (Type 4/3) Approx. 10.71M-Eff...

This adapter can be used as a 1.25" nosepiece for any camera that has C-mount (1") threads. The adapter has male C-threads on the camera side, and ...

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...

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...

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...

Extra-Low Dispersion (ED) objective lenses provide high resolution, high contrast images virtually free of optical defects like chromatic aberrati...

A compact 96mm apochromat for powerful images A compact apochromat for powerful images This APO with a 96mm aperture offers This APO with a 9...

A compact 96mm apochromat for powerful images This APO telescope, boasting a 96mm aperture, presents a delightful combination of outstanding opt...

Item Description: Achromatic Hand Figured Doublet in Push-Pull style cell  Lens Diameter: 104 mm Clear Aperture: 100 mm No of Elements: 2 Focal Le...

100% Safe for Eclipse Viewing Lightweight and generally does not require rebalancing tube assembly. Stronger than any other solar filter film on t...

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...

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...

Fisher Space Pen’s Sealed Pressurized Ink Cartridge performs in temperatures from -30º F to +250º F, underwater, in zero gravity, at any angle - ev...

Whether you’re in the field filling out a tag for that once-in-a-lifetime trophy or marking off your checklist of the never-ending chores that need...

Stars which are eight times or more massive than our Sun end their lives in a most spectacular way; they go supernova. A supernova is the most powe...

To achieve true dynamic balance with a fork-mounted SCT, both top and bottom weights are required. See stock number CWCPC925-CS for the complete to...

Use with focuser FTF3015B-A Known To Fit Celestron C11/CPC11, C14/C14 Edge HD telescopes Thread on Entry (OTA | FRONT) Side of Draw Tube 3.29x16tpi...