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Variable polarizer for imaging with 3.5" and 7" Questars
$495.00This Questar variable polarizing assembly allows you to control the effective f/stop of a Questar telescope during terrestrial and lunar prime focus imaging. -
Zero length adapter for SM60/30 and SM90/30
$39.99The Zero Length Adapter reduces a 2" focuser or star diagonal to hold 1.25" accessories without adding any length to the optical path . . . -
Questar solar filter full-aperture upgrade for 3.5" scopes
$495.00This Questar full aperture white light glass solar filter is an upgrade to the off-axis filter supplied with all Questar 3.5" telescopes.
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Questar protective flat, screw-on MgF2 coated, for 3.5" Questars
$495.00This Questar full aperture protective clear glass flat offers extra protection to your 3.5" aperture Questar telescope or spotting scope's optics.
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Research Series 2" RBG+C+L Filters
$749.00This 50mm LRBGC five filter set drops into the filter carousel in an SBIG STL camera for imaging without vignetting even the largest CCD detector in the series . . . -
Tele Vue Adapter to use 48mm filters with TeleVue IS refractors
$36.00This TeleVue adapter lets you use 48mm filters in the optical train when imaging with TeleVue IS refractors . . . -
Lunt 50mm tunable H-alpha filter with 6mm blocking filter for scopes under 600mm focal length
$1,615.00This 50mm clear aperture Lunt H-alpha filter can be used to provide striking views of solar prominences and disk detail with virtually any telescope having a focal length under 600mm . . . -
Lunt 50mm tunable H-alpha filter with 12mm blocking filter for scopes under 1200mm focal length
$1,961.00This 50mm clear aperture Lunt H-alpha filter can be used to provide striking views of solar prominences and disk detail with virtually any telescope having a focal length under 1200mm . . . -
Lunt 2" Solar Wedge (Herschel wedge) for refractors
$362.00The 2" Lunt white light Solar Wedge yields the highest level of detail and contrast (both visually and photographically) of any white light solar filter available for refractors up to 150mm in aperture . . . -
Lunt 2" polarizing filter
$74.50The 2" Lunt PF-1 polarizing filter is designed for use with 2" eyepieces in the Lunt LS2HW Solar Wedge to control the image brightness during white light visual observing.
