About this product
Part Number: NBZ-48F1828
The Japanese-made IDAS NBZ UHS Dual Band Filter is designed to enhance the contrast of Ha and OIII emission nebula.
These are the Ultra High Speed version for IDAS NBZ filters, which is specially ideal for RASAs and HyperStars as well as camera lenses. Good thing is these are less expensive than the regular NBZ. So double benefits for the ultra high speed optics users. 48mm F1.8 to F4 and 52mm F1.8 to F2.8 While IDAS NBX filter performed well in fast optics at high transmission rates as advertised, unfortunately it suffered from halo issues around bright stars. So IDAS have decided to release a new dual narrowband filter called “NBZ”, which was newly designed from scratch to dramatically reduce internal reflections. And the production process was also modified to achieve this goal.
Everything else remains unchanged. The NBZ is still F2-capable with the same bandpass.
In addition to enhancing contrast IDAS NBZ Filters are designed to accommodate the spectral shift when used with fast optical systems.
This Dual Band Filter is ideal for One-Shot Colour CMOS/CCD Cameras as well as Mono Cameras.
- Ideal flat top bandpass
- Excellent in-band transmission
- Off-centre bandpass accommodates off-axis rays for fast optics (up to F2)
- Steep bandpass edges minimise internal reflections
- No IR blocker required
- Available in 48mm and 52mm sizes
- 2.5mm thickness (parfocal with other IDAS LPS filters)
- IDAS-proprietary IGAD/MBT/UFP quality
NBZ filters are only available in 48mm (2") and 52mm threaded cells.
Detailed Plot of NBZ Ha and OIII Bandpass
|Average Rating (1 Review): |
Sunday, 7 November 2021 | Terry
I bought this filter to use with my SharpStar 15028HNT and ASI294MC-Pro camera, having been disappointed with the results from the L-eXtreme filter at this fast focal ratio. The L-eXtreme produces large halos around brighter stars which seems to be mostly associated with the OIII band - but to be fair to the L-eXtreme, it is really just a problem with the fast scope - it seems fine on my RedCat51 for instance. Anyway, last night I tried the new filter on the Horsehead Nebula. All previous attempts were not brilliant with a huge halo around Alnitak which I simply could not process out. It wasn't the best of nights, howling winds and clouds running through regularly, but at least there was no rain and it was moonless. I only managed to get 15 passable images from the night with horrendous guiding, but the stacked image was pretty good bearing in mind the conditions. If you look hard, you can see some signs of a halo around brighter stars at around 60 to 70 pixels, which is about the size you would expect for this combination, but it is very muted. I am delighted with the first result.
I must also mention FLO who delivered the filter very quickly, as always. But also their excellent packaging saved the filter from the tender mercies of Royal Mail, who had managed to drop something heavy on the box and really crushed one side of it. Despite this, the filter was absolutely fine.
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