refractor telescopes manufacturers

2" Dark Frame Filter The 2" Astronomic Dark Filter is essential for a CCD camera that doesn't have a mechanical shutter. This filter allows you to take dark frames without the hassle of monitoring your set up. The filter is opaque and threaded in a 2" cell. This filter works even better with a filter wheel. Attach this filter to a filter wheel in order to take a dark frame without capping off your telescope. The Astronomic Dark Frame filter is a must-have for many cameras that don't have a mechanical shutter, including interline CCD cameras from Starlight Xpress, Imaging Source, Atik, as well as others.

120mm Tube Ring+160mm length Dovetail 120mm tube rings and 160mm length dovetail,vixen-style the length of dovetail bar :160mm diameter:120mm

Flip Caps with glass The 32mm,44mm,45mm,50mm,53mm,59mm measurement means the inside diameter of the cover，the cover materials is glass.please check your scope's outside diameter. Protect your scope lens from scratches & dust. Waterproof and airtight, keeps dust, dirt and weather off lens surfaces Ambidextrous open and close, durable spring hinges operation, open silently with the flick of a thumb Sold one per package.

  Off-Axis Guider for Astrophotography Delightfully thin off-axis guider ideal for use with Newtonian reflector telescopes and DSLR cameras Lets you guide and capture astrophotos simultaneously through one telescope. No guide scope required! 10.5mm thickness perfect for use with Newtonian reflectors which have limited back focus travel Will not interfere with the use of coma correctors thanks to its thin profile Compensates for any existing flexures that may interfere with accurate guiding and tracking

 Guide Star Dovetail Mounting Plate + Tube Rings for Telescope Short Type • Provides a platform for coupling telescope optical tubes to Atlas equatorial (EQ) telescope mounts. • Attach telescope tube rings to the dovetail mounting plate for easy, no-tools attachment of the telescope to an EQ mount. • 3.81 inch Length plate is especially useful for short focal length refractor telescopes. • Made of anodized aluminum. • Includes 1x dovetail mounting plate, 2x screws.  

1.25" T Adapter for Telescope 1.25" Camera Photography Telescope Eyepiece Holder Adapter 31.7mm-1.25" to T T2 / 1.25 Inch M42 DSLR/SLR Prime Adapter for Telescope Standard 1.25" Prime Focus T-adapter fits on any telescope that uses a 1.25" eyepiece focuser for prime focus photography. Male T thread specification is M42x0.75 To use, insert the 1.25" barrel into your diagonal or telescope, attach your D/SLR camera to the male T-thread (via a T-ring that is specific to your camera; not included), and you are ready to take photos as prime focus with your telescope or spotting scope.