Narrowband Filters

H-α (hydrogen-alpha) at 656 nm (nanometers) is deep red in color and the most popular narrowband filter. Hydrogen is ubiquitous in the cosmos and is present in emission nebula (North American, Pelican), planetary nebula (Dumbbell, Ring), Wolf-Rayet...

H-α (hydrogen-alpha) at 656 nm (nanometers) is deep red in color and the most popular narrowband filter. Hydrogen is ubiquitous in the cosmos and is present in emission nebula (North American, Pelican), planetary nebula (Dumbbell, Ring), Wolf-Rayet...

What about NII and H-a? This is a bit complicated. It is not well known that most H-a filters pass both H-a and NII. H-a emits at 656.3 nm and NII emits most strongly at 658.4 nm (and weakly at 653.8 nm). These are very close together spectrally. Thus,...

The next filter to complement your LRGBH-a set is an oxygen filter. OIII (“ohthree”) emits light near 500 nm and is a blue-green- or teal-colored filter. Many of my images of planetary nebula and supernova remnants are taken only with H-a and...

The next filter to complement your LRGBH-a set is an oxygen filter. OIII (“ohthree”) emits light near 500 nm and is a blue-green- or teal-colored filter. Many of my images of planetary nebula and supernova remnants are taken only with H-a and...

This Red Continuum filter (645 nm, 5 nm FWHM) produces a star map without the H-a or SII emission in order to subtract stars from emission images. Astrodon NB filters are renowned for not producing halos around stars and not leaking NIR light. When it...

If you want the look of Hubble Space Telescope (HST) images, such as the famous “Pillars of Creation” (the Eagle Nebula, Messier 16), then the next filter to consider adding to your collection after H-a and OIII is the SII (es-two) or sulfur...

If you want the look of Hubble Space Telescope (HST) images, such as the famous “Pillars of Creation” (the Eagle Nebula, Messier 16), then the next filter to consider adding to your collection after H-a and OIII is the SII (es-two) or sulfur...

Special offer – Get 50% off any (or all) filter sets, when you buy any Atik mono camera (with the exception of the Atik GP).The SHO narrow band filter set is compatible with our filter wheels and allows astrophotographers to capture deep-sky objects in...

f/2 Highspeed Filterset consisting of 3 Filter: H-alpha, O III and S II. Highspeed Narrowband Filter are designed especially for the delicate requirements of extremely fast astrograph optics, in particular Hyperstar and RASAConventional narrowband...

f/2 Highspeed Filterset consisting of 3 Filter: H-alpha, O III and S II. Highspeed Narrowband Filter are designed especially for the delicate requirements of extremely fast astrograph optics, in particular Hyperstar and RASAConventional narrowband...

Premium grade H-alpha interline chip CCD-filter for fast optical systems f/10 to f/2.8IR-blockedNO halos, NO reflections, NO ghostingNon-aging sealed coating edgesBaader's new H-Alpha passfilter enables high-contrast deep sky images of H-II regions (such...

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NEW: Baader H-alpha CCD-Narrowband-Filter 7nm with 31 diameterPremium grade H-alpha full frame chip CCD-filter for fast optical systems f/10 to f/2.8IR-blockedNO halos, NO reflections, NO ghostingNon-aging sealed coating edgesCCD imagers will find...

1¼" Baader H-Beta CCD-filter 8,5nm with 1¼" (28,5mm) filter threadFor focal ratios between f10 and f2.8H-Beta-CCD-narrowband-filters can also be used for visual observations! (A high-quality alternative to the old...

Premium grade O-III CCD-filter for fast optical systems f/10 to f/2.8IR-blockedNO halos, NO reflections, NO ghostingnon-aging sealed coating edgesCCD imagers will find Baader's Premium Narrowband CCD passfilters to deliver the absolute highest contrast...

3 mm glass thicknessnon-ageing sealed coating edgesCCD 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...

Precision grade enforced H-alpha filter for f/10 to f/3.5 optical systemsOpens up the extremely narrow 3,5nm H-alpha worldThis enforced contrast results in even fainter stars, providing more signal of faintest nebulae detailManufacturing such...

Premium grade O-III CCD-filter for fast optical systems f/8 to f/3IR-blockedNO halos, NO reflections, NO ghostingnon-aging sealed coating edgesBaader's New Ultra Narrowband Enforced FiltersThese three sizes of Ultra-Narrowband filters open up the...