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This is a replacement for the secondary mirror mounting plate that is included with the HyperStar 6.

This is the top half of the Celestron 9.25" SCT counterweight set. Use this if you already have a bottom slidebar kit from Celestron or Losmandy. I...

Note that this version of the counterweight set will not work with the CPC-925 telescopeTo achieve true dynamic balance with a fork-mounted SCT, bo...

This is the top half of the Celestron CPC-925 counterweight set. Use this if you already have a bottom slidebar kit from Celestron or Losmandy. Inc...

Optolong UHC nebula clip filter for Canon EOS APS-C cameras! The UHC (Ultra High Contrast) broadband filter is designed to improve the visibility ...

All Starizona motors come with the correct gears and tools to attach them. This product is only intended to be used as a replacement.

Vixen's newer refractors have a fine-focus mechanism that is attached to the existing focuser pinion by a thin metal plate. This plate is a weak po...

The UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deepsky objects. The UHC (Ultra High Contrast) bro...

This is the top half of the Celestron 11" SCT counterweight set. Use this if you already have a bottom slidebar kit from Celestron or Losmandy. Inc...

Best-selling star chart, ideal for beginning astronomers!These charts are the perfect way to learn the stars and constellations. Simply rotate the ...

Authors: Bruce GrubbsPaperback: 368 pages, 3rd Ed.Lace up your boots and sample 120 of the finest trails in Arizona. Hike the Boucher-Hermit Trails...

When closed, the Bullet Space Pen is the perfect size to carry in your wallet, pocket, purse, car glove box, organizer, or toolbox. When opened it'...

Witness the wonder of the starry sky -- constellations, planets, auroras, and more -- in this profusely illustrated large-format atlas from Nationa...

Cosmos is a visually captivating journey through the Universe and is as expansive as the Cosmos itself. It covers everything from the asteroid belt...

The newest model of Starizona's Nexus 0.75x coma corrector features a removable lip which allows a threaded adapter to be installed.  This gives a ...

Following the Askar N160, ASKAR updates the same product line with a larger-aperture Newtonian reflector telescope—the Askar N210. This new model b...

Used Celestron 8-24mm zoom eyepiece in excellent condition.

Used 1.25" Tele Vue 3x Barlow in excellent condition.  Original box is a bit scuffed but Barlow looks great.  Thumb screw may not be the original b...

Like new Celestron Luminos 23mm eyepiece.  Most likely came with an EdgeHD telescope and was never used.

50mm Dedicated H-Alpha Solar Telescope The LS50THa Standard Kit is Lunt's most popular solar telescope — and the reason is straightforward. It puts...

40mm Dedicated H-Alpha Solar Telescope — Imaging Ready The LS40THa Enhanced Kit builds on the Standard's outstanding optical performance with two t...

E-Wipe® professional cleaning system for critical optics, are conveniently packaged to combine an ultra pure non-abrasive wipe (Pec*Pad® non-abrasi...

The southwestern deserts are home to hundreds of species specially-adapted to survive in this hot, dry environment. This beautifully illustrated gu...

Birds of Mexico and Central America is the only field guide to illustrate and describe every species of bird in Central America from Mexico to Pana...