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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...

The narrow-bandpass OIII filter improves the view of emission and planetary nebulae. The filter works by blocking natural and artificial light poll...

13th edition, 2021. ISBN: 9781734315042 The Grand Canyon State abounds in natural beauty and outdoor recreation possibilities. Completely reworked ...

This richly illustrated folding guide from Waterford Press highlights over 140 familiar and unique species and includes a map featuring prominent b...

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

Arizona s top-selling 4x4 guidebook. 100 of the best 4x4 trails in Arizona. Completely redone 3rd edition is more fun than ever. Whether you are a ...

Enjoy the wonders of the heavens and understand more fully what you see. This Golden Guide shows you how with 150 full-color illustrations, includi...

Embark on a NASA-inspired space mission with the MiniBlock Mars Rover Building Set. Featuring 399 pieces, this detailed set includes a movable robo...

Recreate the legendary Saturn V Rocket with the MiniBlock Saturn V Rocket Building Set. Featuring 391 pieces, this detailed set includes realistic ...

Precision stainless steel shim set for setting precise backfocus of critical optical systems.  Fits M54 threads.  (M42 and M48 sizes also available...

The Azimuth Adjuster Adapter is designed for use on the Twilight Medium Duty or Twilight Heavy Duty tripods.  This adapter also works with the Lig...

130PHQ is a long-focal-ratio, flatfield astrograph newly launched after 107PHQ. Instead of buying extra flatteners, calculating the backfocus of fl...

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

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

Antlia H-alpha Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro n...

ZWO’s 16.5 mm M48 spacer is a aluminum extension ring designed to reach optical spacing in imaging systems that require a precise backfocus. It fea...

In astrography, Nikon, Canon, Sony mirrorless cameras have been used more and more frequently by astronomy amateurs in recent years. Therefore, on ...

Overview f/4 ED coma corrector FPL51 and Schott glass Optimized for Quattro imaging Newtonians Requires 55mm backfocus Delivers stunning wide-fi...

High-strength carbon fiber tripod for Wave mounts  29-inch (747mm) maximum extended length  19.7-inch (500mm) minimum retracted length  44-pound (...

This replacement adapter came with the original Starizona RASA8 Filter Slider converting the bottom M48 to M42 and adding 1mm to the Filter Slider ...

It's the 2020 edition of Professor Noggin with all new photos! Kids will enjoy transferring their energy to learning about Energy, Motion, and Gase...

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

Explore and "color in" the amazing world of minerals and crystals... readers and rockhounds of all ages and skill levels will love this book! Learn...