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 #12 medium yellow Astro-Tech 1.25" eyepiece filter is helpful in improving lunar and Martian contrast in telescopes 4" to 8" in aperture, part...

This #21 orange Astro-Tech 1.25" eyepiece filter is useful in improving contrast when observing the Moon and all planets out to Saturn in telescope...

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...

If you have a big scope (10" in aperture and larger), this #29 dark red Astro-Tech 1.25" eyepiece filter can be useful when observing Mercury and V...

If you have a big scope (8" in aperture and larger), this Astro-Tech #47 violet 1.25" eyepiece filter can help detect high clouds and haze over the...