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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-Highspeed Narrowband Filters

Baader Ultra-Highspeed filters are CMOS-optimized narrowband filters for very fast astrographs working at f/2 or f/3. With a 3.5nm H-alpha and 4nm O-III and S-II passband, they isolate emission lines tightly while staying matched to the steep light cone of fast optics.

Each line is offered in an f/2 and an f/3 version, so you can pick the filter that suits your system. Complete H-alpha/O-III/S-II sets are available for both focal ratios.

Filters

$946.00 - $2,105.00
$946.00 - $2,105.00
$946.00 - $2,105.00
$946.00

Baader 3.5/4nm f/2 Ultra-Highspeed Filter Set - CMOS-Optimized H-alpha/O-III/S-II

Options available

3.5nm (H-alpha, S-II) and 4nm (O-III) Bandpasses Optimized for f/2 Ultra-Highspeed Optical Systems CMOS-Optimized with Reflex-Blocker™ Coatings Pr...

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$946.00 - $2,105.00
$946.00 - $2,105.00
$946.00 - $2,105.00
$946.00
Baader Planetarium Baader S-II 1.25" f/2 Ultra-Highspeed-Filter (4nm) – CMOS-optimized
$324.00 - $671.00
$324.00 - $671.00
$324.00 - $671.00
$324.00

Baader Planetarium S-II f/2 Ultra-Highspeed-Filter (4nm) – CMOS-optimized

Options available

4nm FWHM Bandpass for Sulfur-II (S-II) Engineered for f/2 Ultra-Highspeed Optical Systems Available in 1.25" & 2" Mounted, 31mm, 36mm, 50.4mm ...

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$324.00 - $671.00
$324.00 - $671.00
$324.00 - $671.00
$324.00
Baader Planetarium Baader H-alpha 1.25" f/2 Ultra-Highspeed-Filter (3.5nm) – CMOS-optimized
$363.00 - $873.00
$363.00 - $873.00
$363.00 - $873.00
$363.00

Baader Planetarium H-alpha f/2 Ultra-Highspeed-Filter (3.5nm) – CMOS-optimized

Options available

Engineered for f/2 ultra-highspeed optical systems 3.5nm bandpass for maximum H-alpha contrast CMOS-optimized with anti-reflection coatings Availa...

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$363.00 - $873.00
$363.00 - $873.00
$363.00 - $873.00
$363.00
Baader Planetarium Baader 3.5 / 4nm f/3 Ultra-Highspeed Filter-Set 1.25" – CMOS-optimized (H-alpha / O-III / S-II)
$929.00 - $1,971.00
$929.00 - $1,971.00
$929.00 - $1,971.00
$929.00

Baader Planetarium 3.5 / 4nm f/3 Ultra-Highspeed Filter-Set – CMOS-optimized (H-alpha / O-III / S-II)

Options available

3.5 / 4nm Ultra-Narrow H-alpha, O-III & S-II Bandpasses Pre-Shifted for Fast f/3 "Ultra-Highspeed" Optical Systems CMOS-Optimized with Anti-Re...

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$929.00 - $1,971.00
$929.00 - $1,971.00
$929.00 - $1,971.00
$929.00
Baader Planetarium Baader S-II 1.25" f/3 Ultra-Highspeed-Filter (4nm) – CMOS-optimized
$324.00 - $660.00
$324.00 - $660.00
$324.00 - $660.00
$324.00

Baader Planetarium S-II f/3 Ultra-Highspeed-Filter (4nm) – CMOS-optimized

Options available

4nm Bandwidth (FWHM) Pre-Shifted for Fast f/3 Optical Systems Available in 1.25" & 2" Mounted, 31mm, 36mm & 50.4mm Unmounted Round, and 50...

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$324.00 - $660.00
$324.00 - $660.00
$324.00 - $660.00
$324.00
Baader Planetarium Baader H-alpha 1.25" f/3 Ultra-Highspeed-Filter (3.5nm) – CMOS-optimized
$347.00 - $770.00
$347.00 - $770.00
$347.00 - $770.00
$347.00

Baader Planetarium H-alpha f/3 Ultra-Highspeed-Filter (3.5nm) – CMOS-optimized

Options available

3.5nm H-alpha Bandpass Optimized for f/3 Ultra-High-Speed Systems Available in 1.25" & 2" mounted, 31mm, 36mm & 50.4mm round unmounted, an...

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$347.00 - $770.00
$347.00 - $770.00
$347.00 - $770.00
$347.00
Baader Planetarium Baader O-III 1.25" f/3 Ultra-Highspeed-Filter (4nm) – CMOS-optimized
$317.00 - $667.00
$317.00 - $667.00
$317.00 - $667.00
$317.00

Baader Planetarium O-III f/3 Ultra-Highspeed-Filter (4nm) – CMOS-optimized

Options available

4nm FWHM Ultra-Narrow Bandpass Optimized for f/3 and Faster Optical Systems Available in 1.25" & 2" Mounted, 31mm, 36mm & 50.4mm Round Unm...

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$317.00 - $667.00
$317.00 - $667.00
$317.00 - $667.00
$317.00
Baader Planetarium Baader O-III 1.25" f/2 Ultra-Highspeed-Filter (4nm) – CMOS-optimized
$333.00 - $669.00
$333.00 - $669.00
$333.00 - $669.00
$333.00

Baader Planetarium O-III f/2 Ultra-Highspeed-Filter (4nm) – CMOS-optimized

Options available

4nm FWHM Bandpass Optimized for f/2 Ultra-Highspeed Systems Available in 1.25" & 2" Mounted, 31mm, 36mm, 47.4mm (FCCT) & 50.4mm Round Unmo...

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$333.00 - $669.00
$333.00 - $669.00
$333.00 - $669.00
$333.00