Products

Our 2" Light Pollution Reduction (LPR) Filters are designed to selectively reduce the transmission of certain wavelengths of light, specifically th...

  65 mm Refractor Spotting Scope Multi-Coated optics 45° viewing angle 18-55x zoom eyepiece Sight tube for quick targeting Waterproof Soft carryin...

  80 mm Refractor Spotting Scope Multi-Coated optics 45° viewing angle 20-60x zoom eyepiece Sight tube for quick targeting Waterproof Soft carryin...

80 mm Refractor Spotting Scope Multi-Coated optics Straight through viewing angle 20-60x zoom eyepiece Sight tube for quick targeting Waterproof S...

10mm parfocal Ultra Flat Field eyepiece designed for 1.25” focusers Incredibly crisp views from center to edge of field Fully multi-coated, 5-ele...

15mm parfocal Ultra Flat Field eyepiece designed for 1.25” focusers Incredibly crisp views from center to edge of field Fully multi-coated, 8-ele...

18mm parfocal Ultra Flat Field eyepiece designed for 1.25” focusers Incredibly crisp views from center to edge of field Fully multi-coated, 8-ele...

24mm Ultra Flat Field eyepiece designed for 1.25” focusers Incredibly crisp views from center to edge of field Fully multi-coated, 8-element lens...

30mm parfocal Ultra Flat Field eyepiece designed for 2” focusers Incredibly crisp views from center to edge of field Fully multi-coated, 9-elemen...

Ultimate Stickers Books make learning fun. Each Ultimate Sticker Book presents an array of colorful, photographic stickers of baby animals or dinos...

Unrivaled in its breadth, Universe explores every aspect of the cosmos, from the big bang to planets in our solar system and beyond. Detailed profi...

Powerful 20x optical system for an image that is close-up to the action Large 50mm objective lenses with tremendous light gathering capability Hig...

High-quality everyday binoculars that are easy to take along on all life’s adventures Multi-coated optics increase light transmission for brighter...

This cable is used to convert a serial cable into a cable that is compatible with standard USB ports. Recommended for use with our RS-232 cable (93...

Used ZWO EFW 5x2" filter wheel.  First generation model.  Excellent condition. Includes original adapters, screws, USB cable and box.

Used Baader Morpheus 17.5mm eyepiece.  Like new.  Includes original box, caps, eyeguard and soft case.

Used Baader Morpheus 4.5mm eyepiece.  Like new.  Includes original box, caps, eyeguard and soft case.

Used Baader Morpheus 6.5mm eyepiece.  Like new.  Includes original box, caps, eyeguard and soft case.

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

Used Celestron Luminos 31mm eyepiece.  Very good condition.  Includes original caps, no box.

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

Used Explore Scientific 11mm 82-Degree eyepiece.  Excellent condition.  Includes original caps, no box.

Used Explore Scientific 14mm 100-Degree eyepiece.  Excellent condition.  Includes original caps, no box.

Used HyperStar 9.25 v3.  Excellent condition.  Includes adapter for 17.5mm backfocus M42 camera (ZWO, etc.)

Used HyperStar C11 v3.  Excellent condition.  Includes adapter for 17.5mm backfocus M42 camera (ZWO, etc).  Can be used on EdgeHD scope with option...

Used HyperStar C8 v4 with Filter Slider.  Excellent condition.  Includes adapter for ZWO 17.5mm backfocus M42 camera.

Used Tele Vue 10mm Delos eyepiece.  Like new.  Includes original box and caps.

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...

Used ZWO ASI183MM Pro monochrome camera.  Excellent condition.  Includes all original cables, adapters, case and box.

Used ZWO ASI220MM Mini guide camera.  Like new.  Includes all original cables, adapters and box.

Used ZWO OAG-L off-axis guider.  Excellent condition.

Variable polarizing filters are one of the best filters you can have for a telescope.  They are used to cut down the glare from the moon and bright...

The 1.25-Inch variable Polarizing filter acts like a dimmer switch for your telescope. Adjust the amount of light transmission from 1% to 40% by ro...

  INCLUDED ITEMS: -dovetail bar-curved radius blocks-all necessary mounting hardware Fits all Celestron 11″ OTA’s including CPC and HD models. Cur...

Fits all Celestron 11″ OTA’s including CPC and HD models. Curved radius blocks and mounting hardware include. Uses existing mounting holes in OTA....

Fits V Series dovetail bars. Adds additional weight for balancing OTA’s. Split clamp design grips the dovetail bar along the entire surface of the ...

Fits V Series dovetail bars. Adds additional weight for balancing OTA’s. Split clamp design grips the dovetail bar along the entire surface of the ...

Telescope and spotting scope vibration is caused by windy conditions, an unsteady mount or tripod or even an accidental bump to the instrument, and...

Virtual View - The Visual Back with a Twist! Have you ever been to a star party with both kids and adults and wished you had an easy way to adjust ...

Virtual View - The Visual Back with a Twist! Have you ever been to a star party with both kids and adults and wished you had an easy way to adjust ...

Standard visual back as included with Celestron SCTs. Adapts 1.25" accessories (such as diagonals, camera adapters, etc.) to the standard SCT threads.

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...

Fits all Meade 8″ OTA’s. Uses existing accessory mounting holes in the OTA. No curved radius blocks are needed. Uses existing mounting holes in OTA...

Universal Vixen style dovetail plate 14 inches long. Wt. 1.3 lbs., Length 14.0", thickness 0.6"

Specially prepared to mark the Fifth Anniversary of the launch of the James Webb Space Telescope. Calendar features: Large format, lots of room to...

Baader Wide-T-Ring Canon R to connect Canon EOS R cameras on the Astro T-2 system and S52 dovetail All Baader Wide-T-rings have an S52 dovetail i...

Serving up 58 calorically/nutritionally important wild edibles for the prepper, plant utilitarian, or curious hiker/camper, Wild Edible Plants of ...