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Astrozap Astrozap AZ-1001 Baader Solar Filter - 110mm-120mm (ETX105)
Fits outside diameter range of 110mm-120mm. ETX 105 Baader Filter
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Astrozap AZ-1001 Baader Solar Filter - 110mm-120mm (ETX105)
$82.80
Astrozap Astrozap 90mm-100mm (ETX90) Baader Solar Filter - AZ-1000
Fits outside diameter range of 90mm-100mm. ETX 90 Baader Filter
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Astrozap 90mm-100mm (ETX90) Baader Solar Filter - AZ-1000
$70.80
Astrozap AZ-1573 Glass Solar Filter - Binocular - 60mm-67mm
Pair of glass solar filters for binoculars. 60mm-67mm, 2-3/8 to 2-5/8 diameter.
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AZ-1573 Glass Solar Filter - Binocular - 60mm-67mm
$149.00
Astrozap Astrozap AZ-1513 Glass Solar Filter - FA - 117mm-124mm (C4/ETX105)
Full Aperture Glass Solar Filter 117mm-124mm 4-5/8 to 4-7/8 diameter
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Astrozap AZ-1513 Glass Solar Filter - FA - 117mm-124mm (C4/ETX105)
$117.95
DayStar Daystar Instruments Questar QUARK*
This new, All-In-One design marries high quality components of a telecentric barlow, adapters, snouts and Daystar hydrogen alpha filter into one simple assembly.
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Daystar Instruments Questar QUARK*
$1,295.00
DayStar Daystar Instruments QUARK* Sodium D-Line Filter
Due to popular demand for high resolution, narrow bandpass sunspot imaging, we are proud to offer the new Sodium D-Line Quark filter.
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Daystar Instruments QUARK* Sodium D-Line Filter
$1,195.00
DayStar Daystar Instruments QUARK* Hydrogen Alpha "Eyepiece"
This new, All-In-One design marries high quality components of a telecentric barlow, adapters, snouts and Daystar hydrogen alpha filter into one simple assembly.
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Daystar Instruments QUARK* Hydrogen Alpha "Eyepiece"
$1,295.00
DayStar Daystar Energy Rejection Filter - glass, cell and cap - Specify dimensions
Energy Rejection Filter for Hydrogen Alpha solar filter. Specify dimensions below.
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Daystar Energy Rejection Filter - glass, cell and cap - Specify dimensions
$250.00
DayStar Daystar 2" UV/IR Filter
Designed to help protect sensitive equipment from heat and radiation during solar observation sessions
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Daystar 2" UV/IR Filter
$125.00
Arcturus Arcturus Moon Filter 2
The Arcturus 2" Neutral Density 13 (ND13), transmits 13% of all incident light, while blocking 87%.
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Arcturus Moon Filter 2
$39.95
Arcturus Variable Polarizing Filter 2 Inch
This 2" Variable Polarizing Filter, is the all-phase lunar filter for large telescopes. Transmittance is continuously variable from about 5% to 35%.
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Variable Polarizing Filter 2 Inch
$49.95
Svbony Variable Polarizing Filter 1.25 Inch
The 1.25" Variable Polarizing Filter is the all-phase lunar filter for large telescopes. Transmittance is continuously variable from 5% to 35%.
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Variable Polarizing Filter 1.25 Inch
$39.95
Lumicon Vintage Lumicon 1.25 OIII Oxygen III Light Pollution Nebula Filter (Pre-owned)
The legendary Lumicon 1.25″ OIII narrow band-pass filter isolates just the two doubly ionized oxygen lines (496 and 501nm lines) emitted by diffuse, planetary and extremely faint nebulae.
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Vintage Lumicon 1.25 OIII Oxygen III Light Pollution Nebula Filter (Pre-owned)
$120.00
Lumicon Lumicon 1.25 Deep Sky Light Pollution Nebula Filter
The 1.25″ Deep Sky is Lumicon’s most popular nebula filter. It blocks all high & low pressure mercury and sodium vapor lamp light, neon lights and airglow, while transmitting the rest of the visible spectrum.
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Lumicon 1.25 Deep Sky Light Pollution Nebula Filter
$242.00
Celestron Celestron UHC/LPR Filter - 2 in
Our 2" Light Pollution Reduction (LPR) Filters are designed to selectively reduce the transmission of certain wavelengths of light, specifically those produced by artificial light.
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Celestron UHC/LPR Filter - 2 in
$124.95
Celestron Celestron UHC/LPR Filter - 1.25 in
Improved transmission translates to maximum image brightness and contrast!
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Celestron UHC/LPR Filter - 1.25 in
$94.95
Celestron Celestron Oxygen III Narrowband Filter - 2 in
For detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects!
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Celestron Oxygen III Narrowband Filter - 2 in
$124.95
Celestron Celestron Oxygen III Narrowband Filter - 1.25 in
The 1-1/4" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light.
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Celestron Oxygen III Narrowband Filter - 1.25 in
$94.95
Arcturus Arcturus NBPF Narrowband Hydrogen-Alpha 12nm Filter 2"
Get Great Nebula Images Under City Lights or a Full Moon with the Arcturus Hydrogen-Alpha Narrowband Astrophotography Filter!
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Arcturus NBPF Narrowband Hydrogen-Alpha 12nm Filter 2"
$99.95
Arcturus Arcturus Hydrogen-Beta Filter 2"
A Hydrogen-Beta telescope filter may be the only way to see the faint and elusive Horsehead, California, and Cocoon Nebulas.
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Arcturus Hydrogen-Beta Filter 2"
$99.95
Arcturus Arcturus Hydrogen-Beta Filter 1.25 (LIMITED QUANTITIES)
A Hydrogen-Beta telescope filter may be the only way to see the faint and elusive Horsehead, California, and Cocoon Nebulas.
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Arcturus Hydrogen-Beta Filter 1.25 (LIMITED QUANTITIES)
$59.95
Baader Planetarium Baader Narrowband 8nm S-II Filter
CCD imagers will find Baader's Premium Narrowband CCD passfilters to deliver the absolute highest contrast deep sky images in H-Alpha, H-Beta, Oxygen III, and Sulfur-II, with the shortest exposures possible.
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Baader Narrowband 8nm S-II Filter
$149.00
Baader Planetarium Baader Ultra-Narrowband H-alpha 3.5nm Filter (Specify Size)
Precision grade enforced H-alpha filter for f/10 to f/3.5 optical systems
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Baader Ultra-Narrowband H-alpha 3.5nm Filter (Specify Size)
$297.00
Baader Planetarium Baader Astro Conversion Filter for CANON EOS 300D
This filter is intended for amateurs that are comfortable replacing their camera's stock filter.
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Baader Astro Conversion Filter for CANON EOS 300D
$111.00