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  • In Stock

    Baader 13mm Hyperion 68° Modular Eyepiece

    Baader Planetarium
    $217.00

    Baader Hyperion Eyepiece 13mm Huge 68 degree wide angle field, tailored to the maximum Visual angle of the human eye Phantom group coatings in Zei...

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    $217.00
    In Stock
  • In Stock

    Baader 17mm Hyperion 68° Modular Eyepiece

    Baader Planetarium
    $217.00

    Baader Hyperion Eyepiece 17mm Huge 68 degree wide angle field, tailored to the maximum Visual angle of the human eye Phantom group coatings in Zei...

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    $217.00
    In Stock
  • In Stock

    Baader 21mm Hyperion 68° Modular Eyepiece

    Baader Planetarium
    $217.00

    Baader Hyperion Eyepiece 21mm Huge 68 degree wide angle field, tailored to the maximum Visual angle of the human eye Phantom group coatings in Zei...

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    $217.00
    In Stock
  • In Stock

    Baader 24mm Hyperion 68° Modular Eyepiece

    Baader Planetarium
    $217.00

    Baader Hyperion Eyepiece 24mm Huge 68 degree wide angle field, tailored to the maximum Visual angle of the human eye Phantom group coatings in Zei...

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    $217.00
    In Stock
  • In Stock

    Baader 3.5 / 4nm f/2 Ultra-Highspeed Filter Set – CMOS-optimized (H-alpha, O-III, S-II)

    Baader Planetarium
    from $946.00

    Baader H-alpha / O-III / S-II f / 2 Ultra-Highspeed Filter Set - Premium Grade 3.5 / 4 nm half width (to harmonize the exposure time of H-alpha ...

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    from $946.00
    In Stock
  • Baader 3.5 / 4nm f/2 Ultra-Highspeed Filters – CMOS-optimized (H-alpha / O-III / S-II)

    Baader Planetarium
    from $324.00

    Baader H-alpha / O-III / S-II f / 2 Ultra-Highspeed Filter Set - Premium Grade 3.5 / 4 nm half width (to harmonize the exposure time of H-alpha wi...

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    from $324.00
  • Baader 3.5nm / 4nm Ultra-Narrowband Filter Set – CMOS-optimized (H-alpha, O-III, S-II)

    Baader Planetarium
    from $929.00

    Baader H-alpha / O-III / S-II Ultra-Narrowband (Narrowband) filter set - Premium Grade 3.5 / 4 nm half width (to harmonize the exposure time of H...

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    from $929.00
  • Baader 3.5nm / 4nm Ultra-Narrowband Filters – CMOS-optimized (H-alpha / O-III / S-II)

    Baader Planetarium
    from $320.00

    Baader H-alpha / O-III / S-II Ultra-Narrowband (Narrowband) filter set - Premium Grade 3.5 / 4 nm half width (to harmonize the exposure time of H...

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    from $320.00
  • In Stock

    Baader 5mm Hyperion 68° Modular Eyepiece

    Baader Planetarium
    $217.00

    Baader Hyperion Eyepiece 5mm Huge 68 degree wide angle field, tailored to the maximum Visual angle of the human eye Phantom group coatings in Zeis...

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    $217.00
    In Stock
  • Dropship

    Baader 6.5nm f/2 Highspeed Filter Set – CMOS-optimized (H-alpha, O-III, S-II)

    Baader Planetarium
    from $548.00

    Baader H-alpha / O-III / S-II f / 2 Highspeed Filter Set - Precision Grade 6.5 nm FWHM, recommended for extremely fast optical systems from f / 3...

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    from $548.00
    Dropship
  • Baader 6.5nm f/2 Highspeed Filters – CMOS-optimized (H-alpha / O-III / S-II)

    Baader Planetarium
    from $195.00

    Baader H-alpha / O-III / S-II f / 2 Highspeed Filter Set - Precision Grade 6.5 nm FWHM, recommended for extremely fast optical systems from f /...

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    from $195.00
  • Dropship

    Baader 6.5nm Narrowband Filter Set – CMOS-optimized (H-alpha, O-III, S-II)

    Baader Planetarium
    from $512.00

    Baader H-alpha / O-III / S-II Narrowband Filter Set - Precision Grade 6.5 nm FWHM, recommended for optical systems from f / 10 to f / 3.5 Reflex-...

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    from $512.00
    Dropship
  • Baader 6.5nm Narrowband Filters – CMOS-optimized (H-alpha / O-III / S-II)

    Baader Planetarium
    from $176.00

    Baader H-alpha / O-III / S-II Narrowband Filter Set - Precision Grade 6.5 nm FWHM, recommended for optical systems from f / 10 to f / 3.5 Refle...

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    from $176.00
  • In Stock

    Baader 8mm Hyperion 68° Modular Eyepiece

    Baader Planetarium
    $217.00

    Baader Hyperion Eyepiece 8mm Huge 68 degree wide angle field, tailored to the maximum Visual angle of the human eye Phantom group coatings in Zeis...

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    $217.00
    In Stock
  • In Stock

    Baader AstroSolar Safety Film

    Baader Planetarium
    $44.00

    Baader Planetarium's AstroSolar™ Safety Film delivers white light views of the Sun that are unmatched by any other objective solar filter or materi...

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    $44.00
    In Stock
  • Baader CMOS-optimized L-RGB Filters Set

    Baader Planetarium
    from $391.00

    New CMOS-optimized L-RGB filters from Baader Planetarium with Reflex-Blocker™ and Life-Coat™. Baader CMOS RGB Bandpass Filter RGB-R (595 – 690 m...

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    from $391.00
  • Baader Neodymium (Moon & Skyglow) Filter 2"

    Baader Planetarium
    $171.00

    Selective contrast filter, for all reflector and refractor telescopes Filters out specific wavelengths, especially those caused by streetlight and...

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    $171.00
  • Baader UV-IR Cut Filter - 1.25"

    Baader Planetarium
    $87.00

    Baader Planetarium has introduced the world's finest UV/IR cut filter. This filter is a must for all digital imaging with Digital Cameras, CCD Came...

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    $87.00
  • Baader UV-IR Cut Filter - 2"

    Baader Planetarium
    $143.00

    Baader Planetarium has introduced the world's finest UV/IR cut filter. This filter is a must for all digital imaging with Digital Cameras, CCD Came...

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    $143.00
  • In Stock

    Bahtinov Mask for Seestar S50

    Starizona
    $9.95

    This cute little Bahtinov mask plugs into the front opening of the ZWO Seestar S50 and help with manual focusing.  3D printed from durable carbon f...

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    $9.95
    In Stock
  • In Stock

    Bats of Western North American: A Comprehensive Guide to All Species

    Quick Reference Publishing, Inc.
    $8.95

    Bats are one of the most unique and mysterious animals on earth. You may have feared them or have been fascinated by them. Either way, you have wan...

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    $8.95
    In Stock
  • In Stock

    Binocular Tripod Adapter – Metal Mounting Bracket

    Dark Matter Optics
    $14.95

    All-metal binocular tripod adapter designed for secure mounting of binoculars to standard photo and telescope tripods. Features 1/4"-20 threading o...

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    $14.95
    In Stock
  • In Stock

    Birds of Mexico and Central America

    Princeton University Press
    $29.95

    Birds of Mexico and Central America is the only field guide to illustrate and describe every species of bird in Central America from Mexico to Pana...

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    $29.95
    In Stock
  • C-to-1.25" Adapter

    Starizona
    $24.95

    This adapter can be used as a 1.25" nosepiece for any camera that has C-mount (1") threads. The adapter has male C-threads on the camera side, and ...

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    $24.95