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Astromania 2" NBPF filter suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants. Bright nebulae can be viewed more clearly using NBPF filter in conditions of light pollution.
12nm Narrowband NBPF Hydrogen Filter
nebula observation allowing 12nm bandwidth of light centered on a wavelength of 660nm to pass through, 90% transmission at H-alpha line 656nm - whether under dark skies or under the sky glow of a city. That means the filter also blocks the infamous stray light and light from mercury and sodium vapour lamps.
Just One Step Convenient to Mount
Astromania 2" NBPF Hydrogen-A 12nm Filter - Good and Trustworthy Partner
Xavier
Reviewed in the United States on July 15, 2024
This is a 12nm H-alpha filter at 139. dollars. The Svbony has a 5nm H-alpha for 129 dollars. 5nm is way better than 12nm. Do your reseach and get your hard earn money's worth.
Artic Wolf
Reviewed in the United States on October 11, 2024
Checked it with the spectra scope. Only band you're going to see 😅. Use for analyzing H content of gas clouds, nebula, stars and star classification and stacking. Don't use it to see cold hydrogen. You won't.
Duane C.
Reviewed in the United States on January 12, 2024
Does exactly what it’s supposed to do!
saquack
Reviewed in the United States on April 12, 2024
I don't know if the one I got is defective or what, but I can't see anything through this filter. I had high hopes after seeing the reviews and images on here but what I got was completely unusable.
Richard S.
Reviewed in the United States on June 24, 2020
Ok, here's the deal. Some have written that this filter doesn't deliver, that their images taken with a one-shot DSLR comes out dark, if anything at all. There is a reason for that: Unmodded DSLR cameras have a IR/UV cut filter built into the camera... it blocks all the infrared in the image.... and that includes any Ha (which is deep red) that even this filter will pass through! So please, don't expect this to work like a charm in your UNmodded DSLR. However, if you DO have a modded DSLR or a astroimaging camera (ex: ZWO color imager camera) without the IR/UV cut filter you will gain what you are looking for! Secondly, since this filter cuts everything but the Ha you can expect your exposure time to increase to perhaps 3x-5x longer than an image without any filters. Just so you know... Thanks, Astromania for making imaging of Ha possible without $$$$$$ !
Michael A Heim
Reviewed in the United States on June 20, 2020
Had this filter out last night and captured M9 and M16 from light polluted Bortle 8 skies. Awesome performance. I really like the price. Way cheaper than the big names, and the quality appears good. Did soome 10 min exposures in the city, and saw no wideband blowby. Cant beat it for the price.
David
Reviewed in the United States on November 27, 2020
I haven't had a chance to image with this yet, but the threads on it work fine and I can't see any optical or mechanical issues by looking through it. I'll update my review once I have a chance to use it .
Kevin W
Reviewed in the United States on January 30, 2020
I just received this Hydrogen Alpha filter. I have not used it yet with my ‘scope.I took the filter to where I work and did a spectral transmission scan with the spectrometer I use in the optics lab.The scan results are fairly good.The narrow band is centered where it’s supposed to be at 656.3 nm. The Full Width at Half Maximum (FWHM) is about 9.1 nm, so it’s slightly narrower than the 12 nm specified, but that’s OK for me. Also the peak transmittance is 85%, not 90%, so it’s a bit lower than advertised. The 380 to 1050 nm transmittance graph shows the nice, narrow peak. The close-up, normalized transmittance graph from 640 to 680 nm shows the details of the transmission band.The blocking outside the HAlpha line is also good, though it could be better. The log-transmittance plot shows that the transmittance is less than 1% from ~400 to 975 nm except of course at 656.3. Thus, ’light pollution’ light as well as moonlight will be attenuated quite well. For the H Alpha filter needs of most amateurs, including advanced amateurs, the filter should work well.Overall, the filter is a great buy for most all astrophotographers. Highly advanced users with demanding technical needs might want to find a better filter, recognizing that better filters cost significantly more money.
Stephen O.
Reviewed in Canada on January 29, 2020
I used this with a 250mm lens and a ZWO ASI120MM-S to try it out. With two minute exposures from near downtown of a major city, I think it worked quite well. I only managed about 40 minutes of exposure before it went behind a building, but the horsehead nebula is clearly visible. There’s an internal reflection on the bright star, but that seems to be the lens itself (shows up without the filter).
@astrophoto_canada
Reviewed in Canada on November 14, 2018
A nice filter for the price. This is my first narrowband filter so can’t compare directly. I’ve also purchased and LRGB set and OIII filter but have yet to try them.‘Instagram’ at astro_photocanada
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