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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...

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...

The largest aperture scope in the Ultima line, the 100mm Ultima offers more than 50% brighter images than the 80mm, allowing for better performanc...

Eyepieces at or near the 10mm range are often considered a mandatory focal length in your collection, as this focal length range is departure p...

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...

A new generation - the world-first - galaxy and nebula booster filter intended for shooting not only nebulae, but also galaxies by the use of the t...

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...

Note that this version of the counterweight set will not work with the CPC-800 telescopeTo achieve true dynamic balance with a fork-mounted SCT, bo...

PLAY & LEARN: Professor Noggin’s series of educational card games encourages kids to learn interesting facts about their favorite subjects. F...

Optolong UHC nebula clip filter for Canon EOS full frame cameras! The UHC (Ultra High Contrast) broadband filter is designed to improve the visibi...

Use this adapter to connect a camera with female T-threads to a device with male C-threads. Ideal for using T-thread autoguiders such as the Orion ...

Use this female T-thread to male T-thread spacer to extend standard T-thread adapters to achieve the correct backfocus for your telescope. Availabl...

Ideal for using a 68mm OAG, our M68 T-adapter fits any Celestron telescope with the larger 3.29" rear cell threads.  It is compatible with all C11 ...

Made from anodized aluminum. This finder base includes two thumbscrews to attach your favorite finder scope. The bottom slot is 34mm wide by 39mm l...

The Twilight I is a light-to-medium-duty alt-azimuth mount and tripod designed to quickly and easily accept small to medium sized refractors, such ...

The iEXOS-100 is an astronomical GOTO system that utilizes a proven German equatorial mount design and Explore Scientific’s revolutionary PMC-Eight...

Optolong IR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging to produce a sharper luminance image ...

L-eXtreme is a two 7nm bandpass filter which can be used with one-shot color cameras like DSLR's (digital SLR), and monochrome CCD cameras, it is a...