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Buckeyestargazer Buckeyestargazer TriBahtinov Mask - Celestron C8 (including Ultima 2000)
A TriBahtinov mask operates under the same principle as the Bahtinov mask for focusing and adds the ability to collimate scopes with collimatable optics.  
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Buckeyestargazer TriBahtinov Mask - Celestron C8 (including Ultima 2000)
$27.00
Full Moon Glow in the Dark T Shirt
Full moon glow in the dark T-Shirt
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Full Moon Glow in the Dark T Shirt
$20.00
Bausch & Lomb Criterion A.R. 12.7mm (1.25) Eyepiece
Criterion A.R. 12.7mm (1.25) Eyepiece
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Criterion A.R. 12.7mm (1.25) Eyepiece
$29.00
Celestron Celestron TrailSeeker ED 10x50 - Model 71408
TrailSeeker ED 10x50 - Model 71408
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Celestron TrailSeeker ED 10x50 - Model 71408
$439.95
Celestron Celestron Labs Digital Wi-Fi Desktop Microscope - Model 44351
Celestron Labs Digital Wi-Fi Desktop Microscope - Model 44351
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Celestron Labs Digital Wi-Fi Desktop Microscope - Model 44351
$599.95
NASA Jr. Astronaut Suit with Embroidered Cap, Apollo (White, ,2/3)
NASA Jr. Astronaut Suit with Embroidered Cap, Apollo (White, ,2/3)
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NASA Jr. Astronaut Suit with Embroidered Cap, Apollo (White, ,2/3)
$59.99
Optolong Optolong SII 3nm CCD Filter
Optolong SII 3nm CCD Filter
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Optolong SII 3nm CCD Filter
$460.00
Optolong Optolong OIII 18nm Filter
Designed for nebula observation allowing 18nm bandwidth of light centered on a wavelength of 500nm through
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Optolong OIII 18nm Filter
$87.00
Optolong Optolong H-Alpha 3nm CCD Filter
Suitable for telescopes and lenses with focal ratios of f/3 and lower
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Optolong H-Alpha 3nm CCD Filter
$460.00
Optolong Optolong 3 Filter Set H-Alpha, SII, & OIII
SHO6.5nm filter kit includes SII6.5nm, H-Alpha7nm, and OIII6.5nm narrow-band filters
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Optolong 3 Filter Set H-Alpha, SII, & OIII
$509.00
Optolong Optolong UV-IR Cut Filter
Optolong UV/IR Cut filter is designed for ultraviolet and infrared wavelength blocking to improve sharpness of the image as most of the optics are designed for the visible spectrum
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Optolong UV-IR Cut Filter
$49.00
Optolong Optolong SHO-3nm Narrowband Filter Kit
Optolong SHO-3nm filter kit includes SII3nm, H-Alpha3nm, and OIII3nm narrow band filters
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Optolong SHO-3nm Narrowband Filter Kit
$1,319.00
Optolong Optolong L-Ultimate Light Pollution Dual Band Filter
The Optolong L-Ultimate is Optolong's newest and NARROWEST dual-band filter
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Optolong L-Ultimate Light Pollution Dual Band Filter
$419.00
Optolong Optolong UHC Filter
This UHC, or Ultra High Contrast, filter from Optolong provides a bit more contrast than the CLS filter, but works in much the same way
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Optolong UHC Filter
$85.00
Optolong Optolong Variable Polarizing Filter
Adjust the brightness level of the Moon, Venus, and other bright objects with the Optolong Variable Polarizer.
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Optolong Variable Polarizing Filter
$43.00
Optolong Optolong IR Pass 685nm Filter
Blocks wavelengths below 670nm to enhance contrast and surface detail and reduce the effects of seeing when used in IR-LRGB imaging of the moon and planets
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Optolong IR Pass 685nm Filter
$129.00
Optolong Optolong 5 Filter Set LRGB & H-Alpha
This Optolong LRGB/H-Alpha filter set combines everything you need for stunning planetary and deep-sky observations.
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Optolong 5 Filter Set LRGB & H-Alpha
$406.00
Optolong Optolong LRGB CCD Filterset
The LRGB filter set is designed for maximum contrast and with extremely high gradients for clear differentiation of colors
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Optolong LRGB CCD Filterset
$249.00
Optolong Optolong CLS-CCD Filter
The CLS-CCD broadband filter is designed to improve the visibility of various deepsky objects.
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Optolong CLS-CCD Filter
$105.00
Optolong Optolong Clear Focusing Filter
Optolong Clear focusing filter is designed to highly pass the visible spectral region 420-680nm at 98.5% transmission
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Optolong Clear Focusing Filter
$33.00
Optolong Optolong H-Beta Narrowband Filter
Designed for nebula observation allowing 12nm bandwidth of light centered on a wavelength of 486nm through
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Optolong H-Beta Narrowband Filter
$90.00
Optolong Optolong Moon & Skyglow Filter
Darken the background sky by blocking light transmission from skyglow
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Optolong Moon & Skyglow Filter
$35.00
iOptron iOptron HEM27 EQ Strain Wave Hybrid Mount with iPolar (OPEN BOX - FULL WARRANTY)
iOptron’s revolutionary hybrid strain wave drive mount
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iOptron HEM27 EQ Strain Wave Hybrid Mount with iPolar (OPEN BOX - FULL WARRANTY)
$1,995.00
Bell & Howell 8mm Film Projector (Porter's ELectronics)
Bell & Howell 8mm Film Projector (Porter's ELectronics)
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Bell & Howell 8mm Film Projector (Porter's ELectronics)
$259.00