IDAS NBZ dual narrowband filter

As shown above, NBZ (former NBX) maintains original transmission rate even the spectrum shift occurs while the conventional design dramatically looses the emission signal. They are still 10nm vs 7nm comparison. But we should consider at the viewpoint of S/N ratio.

• 10nm each for OIII and Ha respectively
• Flat-top
• High transmission
• Off-center design
• Allows for f/2 optics without loosing the emission signals
• No IR blocker required

The Japanese-made IDAS NBZ Dual Band Filter is designed to enhance the contrast of Ha and OIII emission nebula. 

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.

Features include

• 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