Products

This Antares 1.25" 0.5x focal reducer lens (tele-compressor) is used under the Orion brand name to thread into the nosepiece of Orion StarShoot Sol...

This Antares ND9 (neutral density 0.9) gray filter reduces the brightness and glare that can mask low contrast details during lunar and planetary o...

This inexpensive finderscope quick-release bracket is designed to mount 50mm Antares right-angle finders primarily on Celestron and Meade Schmidt-C...

This right-angle erect/right-reading image finderscope is a sensible replacement for the straight-through inverted image 9 x 50mm finder supplied w...

This right-angle erect image finderscope is a sensible replacement for the straight-through inverted image 9 x 50mm finder supplied with many curre...

This blue 7 x 50mm right-angle erect/right-reading image multicoated achromatic doublet finder is available as a more-convenient replacement for th...

This right-angle erect image finderscope is a sensible replacement for the straight-through inverted image 8 x 50mm finder supplied as standard equ...

This right-angle erect/right-reading image finderscope is a sensible replacement for the straight-through inverted image 9 x 50mm finder supplied w...

This right-angle erect image finderscope is a sensible replacement for the straight-through inverted image 9 x 50mm finder supplied with many Celes...

This erect image/right-reading right-angle finderscope is a sensible and convenient replacement for the straight-through inverted image 8 x 50mm fi...

This right-angle erect image finderscope is a sensible replacement for the straight-through inverted image 8 x 50mm finder supplied as standard equ...

This right-angle erect/right-reading image illuminated finderscope is a sensible replacement for the straight-through inverted image finder supplie...

This right-angle erect image illuminated finderscope is a sensible replacement for the straight-through inverted image finder supplied with Meade L...

This right-angle erect/right-reading image finderscope is a sensible replacement for the straight-through inverted image finder supplied with Meade...

This right-angle erect image finderscope is a sensible replacement for the straight-through inverted image finder supplied with Meade LXD55 and LXD...

This focal reducer and field flattener consists of a four-element multicoated 40mm lens in a metal cell. It threads onto the rear cell of 5" to 16"...

This flexible manual slow motion control cable is 8.5" long. It will work on the 6mm diameter declination or right ascension control shafts of most...

This could well be the only Moon reference you'll ever need at your Newtonian reflector telescope. This large laminated Field Map of the Moon measu...

This newly drawn large laminated Moon map identifies over 1000 landmarks visible in refractors and catadioptric telescopes, including features in t...

This #23A light red Astro-Tech 1.25" eyepiece filter is useful when observing Mercury and Venus during the day and at twilight and when observing M...

This economical Astro-Tech 2" 0.8x reducer/field flattener is designed for astrophotography with f/6 focal ratio refractors, but will also work wel...

This 1.25" Astro-Tech first-surface mirror star diagonal was named a Sky & Telescope Hot Product for 2007! Sky & Tel recognized that the As...

If you are a serious deep space astrophotographers with a big mount, this Sky & Telescope 2016 Hot Product 12" Astro-Tech AT12INT carbon fiber ...

This newest Version A of the Astro-Tech AT12RCT carbon fiber Serrurier truss Ritchey-Chrétien Hot Product for 2015 makes high quality large-apertur...