Baader 3.5/4nm f/2 Ultra-Highspeed SHO Filter Set - 50x50mm Square Unmounted

Name: Baader 3.5/4nm f/2 Ultra-Highspeed SHO Filter Set - 50x50mm Square Unmounted
Brand: Baader Planetarium

Baader Planetarium

Baader 3.5 / 4nm f/2 Ultra-Highspeed Filter Set – CMOS-optimized (H-alpha, O-III, S-II) - 50 x 50mm is a narrowband filter in 50 x 50mm for mono emission-line imaging.

imaging-filter premium

Baader 3.5/4nm f/2 Ultra-Highspeed SHO Filter Set - 50x50mm Square Unmounted

Best Current Offer

High Point Scientific

In stock

$1,610.00

Other retailers

Starizona (Out of stock)
$1,610.00

Specifications

Filter

Filter type: Single-line narrowband filter
Filter size: 50 x 50 mm
Substrate / coating: plane-optically polished

Spectral

Passbands: H-alpha 656.3 nm (4 nm) / OIII 500.7 nm (4 nm) / SII 672.4 nm (4 nm)
Band count: 3 bands
Narrowest bandpass: 4 nm

Specifications

Thickness: 2 mm

Use

Camera use: Mono astronomy cameras
Fast optics note: Fast-optics optimized

Astrophotography Fit

Best for isolating emission lines with a mono camera and filter wheel.

Baader 3.5 / 4nm f/2 Ultra-Highspeed Filter Set – CMOS-optimized (H-alpha, O-III, S-II) - 50 x 50mm is a premium narrowband filter (50 x 50mm).

Best for isolating emission lines with a mono camera and filter wheel.

Choose filter size around the sensor diagonal, telescope speed, and filter-wheel or drawer geometry. Flats are still required; a filter can improve contrast, but it will not rescue tilt, bad focus, or poor calibration.

Best paired with

Monochrome camera, matching filter wheel, and autofocus offsets
Ha/OIII/SII emission nebula projects
Long integrations with darks, flats, and careful star handling

Not recommended for

Unmodified color cameras as the primary workflow
Targets dominated by broadband continuum signal
Slower systems if the filter is a highspeed/f/2-shifted version

Where To Buy

Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.

Retailer	Price	Availability	View Offer
High Point Scientific High Point Scientific	$1,610.00	In stock Updated 11/4/2026	View Offer - $1,610.00
Starizona Starizona	$1,610.00	Out of stock Updated 11/4/2026	View Offer - $1,610.00

Price History

Chronological retailer pricing with out-of-stock points shown at reduced opacity.

High Point Scientific Starizona