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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

Baader Ultra-Narrowband CMOS Filters

Baader Ultra-Narrowband filters are CMOS-optimized narrowband filters with a 3.5nm H-alpha and 4nm O-III and S-II passband. The tight bandwidth gives strong contrast on emission nebulae and helps under light-polluted skies or a bright Moon.

They are designed for telescopes at conventional focal ratios, while the Highspeed versions serve very fast optics. Choose the individual H-alpha, O-III or S-II filter, or the complete 3.5nm/4nm set for SHO imaging with a mono camera.

Filters

$929.00 - $1,982.00
$929.00 - $1,982.00
$929.00 - $1,982.00
$929.00

Baader 3.5nm / 4nm Narrowband Filter Set - CMOS-Optimized H-alpha/O-III/S-II

Options available
2 variants in stock

3-Filter Set: H-alpha (3.5nm), O-III (4nm), S-II (3.5nm) Ultra-Narrow Bandpasses for Maximum Image Contrast CMOS-Optimized to Eliminate Halos and ...

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$929.00 - $1,982.00
$929.00 - $1,982.00
$929.00 - $1,982.00
$929.00
$320.00 - $692.00
$320.00 - $692.00
$320.00 - $692.00
$320.00

Baader 4nm Ultra-Narrowband OIII Filter - CMOS-Optimized

Options available
2 variants in stock

4nm Ultra-Narrowband OIII Bandpass Optimized for Modern CMOS Sensors Reflex-Blocker™ Hard Coatings to Prevent Halos Life-Coat™ Technology for Extr...

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$320.00 - $692.00
$320.00 - $692.00
$320.00 - $692.00
$320.00
Baader Planetarium Baader S-II 1.25" Ultra-Narrowband-Filter (4nm) – CMOS-optimized
$324.00 - $694.00
$324.00 - $694.00
$324.00 - $694.00
$324.00

Baader Planetarium S-II Ultra-Narrowband-Filter (4nm) – CMOS-optimized

Options available
1 variants in stock

4nm Full-Width Half-Maximum (FWHM) Bandpass Optimized for Modern CMOS Sensors Available in 1.25" (M28.5 x 0.6) & 2" Mounted, 31mm, 36mm & ...

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$324.00 - $694.00
$324.00 - $694.00
$324.00 - $694.00
$324.00
Baader Planetarium Baader H-alpha 1.25" Ultra-Narrowband-Filter (3.5nm) – CMOS-optimized
$352.00 - $795.00
$352.00 - $795.00
$352.00 - $795.00
$352.00

Baader Planetarium H-alpha Ultra-Narrowband-Filter (3.5nm) – CMOS-optimized

Options available
1 variants in stock

3.5nm Ultra-Narrow Bandpass Available in 1.25" & 2" mounted, 31mm, 36mm & 50.4mm round unmounted, and 50x50mm & 65x65mm square sizes C...

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$352.00 - $795.00
$352.00 - $795.00
$352.00 - $795.00
$352.00