$100 to $200

Features Waterproof 10x magnification 42mm lens diameter 384ft field of view at 1000 yards Case, strap and cleaning cloth Description The Nati...

Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen "through" Absorbs almost all of the artificial l...

Features Reveals Details of Artwork and Crafts Fully Coated Optics Ribbed Rubber Focus Collar Fold-Down Rubber Eyecup BK7 Roof Prism Exceptionall...

Features Very high sharpness and contrast across the entire field of view Almost no color defects due to lanthanum glass Twist-Up eyecup for peop...

Features Dark-Sky filter Contrast increase in aurora & deep-sky photography Reduction of stray light from street lights, for example Wide-ang...

Features Very high sharpness and contrast across the entire field of view Almost no color defects due to lanthanum glass Twist-Up eyecup for peop...

Features Waterproof National Geographic Harness 283ft field of view at 1000 yards Carrying case and lens covers included Description These ver...

Features 8x Magnification Waterproof Twist-up Eyecups 394ft field of view at 1000 yards Case, strap, lens covers and cleaning cloth Descriptio...

Features Very high sharpness and contrast across the entire field of view Almost no color defects due to lanthanum glass Twist-Up eyecup for peop...

Features Very high sharpness and contrast across the entire field of view Almost no color defects due to lanthanum glass Twist-Up eyecup for peop...

Features Very high sharpness and contrast across the entire field of view Almost no color defects due to lanthanum glass Twist-Up eyecup for peop...

Features Very high sharpness and contrast across the entire field of view Almost no color defects due to lanthanum glass Twist-Up eyecup for peop...

Features Very high sharpness and contrast across the entire field of view Almost no color defects due to lanthanum glass Twist-Up eyecup for peop...

Features Very high sharpness and contrast across the entire field of view Almost no color defects due to lanthanum glass Twist-Up eyecup for peop...

Features 80mm aperture will reveal impressive lunar details ranging from craters to rilles, planetary features like Saturn’s ring structure or Ju...

Features Very high sharpness and contrast across the entire field of view Almost no color defects due to lanthanum glass Twist-Up eyecup for peop...

Features The magnification of 6x is the best compromise between the brightness and the sight, particularly when used indoor generally The incorpo...

Features Very high sharpness and contrast across the entire field of view Almost no color defects due to lanthanum glass Twist-Up eyecup for peop...

Description The Azimuth Adjuster Adapter is designed for use on the Twilight Medium Duty or Twilight Heavy Duty tripods.  This adapter also works ...

Features Observing the stars like a good astronomer is very easy with the refractor 70/700 Callisto telescope Includes telescope, mount, tripod, ...

Description Water resistant rubber heater. Reduce night dew on objective lens or main mirror. Specs Length 665mm Weight 320g Length of...

Features Optical tube assembly only ready for daytime solar or nighttime stellar use, for visual or astroimaging applications.  80mm aperture wi...

Features Special mount atop telescope tube allows users to attach their device to the telescope and easily locate constellations and planets in t...

Description Keep out stray and unwanted light from your 20" Truss Tube Dobsonian telescope with a lightweight light shroud. Keeping the path dark ...