In Stock

Optolong H-Alpha 7nm filter is the popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducin...

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...

Carrying case for most 8”, 9.25” or 11” Schmidt-Cassegrain or EdgeHD optical tube; along with the 8" RASA optical tube Space for carrying accesso...

M54 Sensor Tilt Plate Thickness: 5mm Suitable for APS-C and full frame cameras (ASI2600, ASI6200 and ASI2400) You can connect it to M68 OAG and 2” ...

M42 female to M42 male 4.5mm spacer.

All Pro cameras (with cooler) need to be connected to an external 11-14v power supply to image.  You can also use ASIAIR to power the cameras. Even...

The 0.8x reducer can bring Askar 185APO's focal ratio down to F5.6. This is a standard reducer with field flattening capabilities as well. A shor...

This Vixen-style, narrow, universal dovetail plate from Askar is designed for a variety of setups. Compatible with Vixen-style mounts, this univers...

The ideal storage and transport solution for a wide range of tripods and their accessory trays with internal straps for a secure fit. Ultra-durabl...

40x to 600x magnification, up to 2400x with digital zoom 4.3" LCD touchscreen 5MP CMOS built-in digital camera 5 fully achromatic objective lense...

Pollinators in Arizona include bats, bees, hummingbirds, butterflies, moths, wasps, flies, and beetles. These beneficial species are both beautiful...

Learn about stars, our moon, planets (visible with the naked eye), eclipses, meteor showers, and other celestial events with this engaging, portabl...

Travel to the furthest reaches of the Universe and visit 100 remarkable objects along the way with this stunning space book for curious kids aged 6...

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

This adapter ring will convert a standard HyperStar C14 into an HD version to work on an EdgeHD telescope.  It simply threads into the existing...

0.92x Field Flattener / Reducer for all APOs 2 Glass Elements ED 55mm Back Focus, adjustable T2 AP85 to 469mm f/5.5 AP95 to 529mm f/5.5 AP106 to 64...

In the almost 15 years since the release of the fifth edition of The Universe and Beyond, our understanding of the universe has advanced exponentia...

The thickness of the M42M-M48F 22.5mm extender is 22.5mm. It is an important astronomical accessory for ASI2600MM Pro users who want to connect the...

Conceived in a dream in July 1948, Paul Fisher was soon machining a new pen design shaped from solid aluminum. It became the first Fisher ball poin...

Finder Charts are printed on white vellum card stock to make them durable. The black printing and stars on a white background makes them easily rea...

Imagine a world without light. What would it be like? Dark, cold, and lifeless! In Explore Light and Optics! With 25 Great Projects, readers ages 7...