Products

CNC machined primary mirror mask made of aluminum (EN AW-6061), black matte anodized, suitable for Sky-Watcher 250PDS/Quattro The precisely machine...

  CNC machined primary mirror mask made of aluminum (EN AW-6061), black matt anodized, suitable for 8" TS-Optics/GSO Newtons The precisely machine...

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...

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

Overview At just over 4 inches in diameter and a few inches thick (IMX585), the new miniCAM8 is a compact, high-resolution, high-performance, coole...

  150mm aperture, 600mm focal length  Fast f/4 focal ratio  Parabolic borosilicate mirrors utilizing Sky-Watcher’s proprietary Radiant ™ Aluminu...

Starizona's QuickSwitch allows the use of a ZWO EAF focus motor on an SCT while maintaining the ability to manually focus.  This makes it easy to s...

Stainless steel 3kg/6.6lbs for RST-135 mounts

Rainbow Astro RST-135 Vixen Saddle

Features Compact and light Mount weighs only 7.2lb / 3.3kg. You do not need a separate bag for Mount. Just put it in your backpack. Equatorial / Al...

Counterweights Not Required Only 8.5kg weight Capacity 30kg (max 50kg) Strain Wave Gear (Harmonic Drive) Built-in brake (RA...

20mm adapter that connects Starizona's Filter Slider to the Stock RASA 11 adapter for ZWO Cooled cameras. Yay!

The Starizona RASA 8 Filter Holder allows you to use 2" filters with the Celestron RASA 8" telescope with cameras that are not compatible with a Fi...

The RASA 8 Filter Holder allows the use of 2" filters on Celestron's RASA 8" telescope with a camera using M54 threads and having a 17.5mm backfocu...

Purchase additional filter holders to easily use multiple filters with the Starizona Filter Slider. Holds standard 2" mounted filters with 48mm thr...

Our Red Dot Finderscope Bracket is designed for rigidity and long-term durability, with a reinforced base that resists flex under demanding use. Ma...

Preserve your night vision while stargazing with this straightforward red LED flashlight. The single-button design makes it effortless to toggle on...

By removing the original faceplate or tip-tilt adapter on the RedCat 51 you can thread this adapter directly to the scope giving you the correct th...

The EdgeHD .7x Focal Reducer Lens makes your EdgeHD 1400 one full F-Stop faster than f/11, reducing your exposure time by half to capture the same...

The EdgeHD .7x Reducer Makes Your EdgeHD 800 One Full F-Stop Faster Than f/10, Reducing Your Exposure Time by One-Half to Capture the Same Brightn...

  The EdgeHD .7x Focal Reducer Lens makes your EdgeHD 9.25" one full F-Stop faster than f/10, reducing your exposure time by half to capture the s...

  ED Objective Lens: Minimizes chromatic aberration, accurate color reproduction, increased resolution and contrast XLT Coatings (Fully Multi-Co...

Reptiles and Amphibians of the Sonoran Desert: A guide to 41 of the most commonly encountered reptiles and amphibians native to the Sonoran Desert ...

Named for the Latin word for butterfly, PENTAX Papilio 6.5x21 binoculars are the perfect choice for insect observation in the field and in museums ...

Named for the Latin word for butterfly, PENTAX Papilio 8.5x21 binoculars are the perfect choice for insect observation in the field and in museums ...

One Tenth the size and weight of the competition's "reflex" sight, makes aiming your telescope easy with its wide-open right-side-up view. Projects...

Rock collecting is simple and fun with this children’s book that includes an introduction to geology, an identification guide to rocks and minerals...

Author: O. Richard NortonPaperback: 444 pagesThis popular nontechnical introduction to meteorites, asteroids, comets, and impact craters is now eve...

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...

Allows Celestron computerized telescopes (CPC, CGE, NexStar, Advanced Series) to be connected to a RS-232 serial port for computer control. A USB-t...

Counterweights Not Required Only 3.4kg weight ±2.5arcsec PE Capacity 13.5kg (max 18kg) Strain Wave Gear (Harmonic Drive) ...

SBIG AFW Filter Wheels are fast and quiet, and are designed to be compatible with our full line of SBIG cameras.  Two size formats are available: L...

The Aluma AC461 is a research grade, high performance 102 megapixel scientific imaging camera. The IMX461 sensor features extremely high quantum ef...

The Aluma® Series cameras offer capabilities and features not available in any other scientific-grade imaging camera.  This lightweight (2.2 lbs) a...

OM3 Fiber Optic Cable – various lengths.