- Description
IDAS NB Filters are designed to enhance the contrast of emission nebula, yet accommodate the filter spectral shift*when used with modern fast optical systems.
Features include:
- Ideal flat-top and moderate bandpass
- Excellent in-band transmission
- Extremely steep bandpass edges minimize internal reflections
- Near IR (NIR) is blocked up to 1100nm
- Available in 52mm and 48mm sizes
- 2.5mm thickness (parfocal with other IDAS LPS filters)
- IDAS-proprietary IGAD/MBT/UFPquality
- Made in Japan
* All interference filters are subject to a bandpass spectral shift which depends on the angle of incidence of the incoming light. IDAS NB filters are designed to accommodate the spectral shift of modern fast optical systems.
When placed in front of an optical system, the spectral shift is determined by the focal length of the optics and the size of the imaging sensor. For an APS-C sensor, up to a 50mm focal length can be accommodated. For a full-frame sized sensor, up to an 80mm focal length can be used.
For filters placed between the optical system and imaging sensor, the situation is more complex. IDAS NB filters are designed with modern fast optics in mind and can accommodate an angle of incidence of up to 14°.
You may also like
Recently viewed
Recent Blog Posts
View allZWO Duo camera's and compatible image circles
Maximize Performance with the Right Image Circle for Your ZWO ASI2600 and ASI585MC Air Cameras
If you're using one of the latest ZWO ASI Air cameras,
Read More
Read More
Navigating Optolong Filters: L-eNhance, L-eXtreme, and L-Ultimate for Astrophotography
Navigating Optolong Filters: L-eNhance, L-eXtreme, L-Ultimate, and L-Quad Enhance for Astrophotography
If you're capturing the night sky with a color
Read More
Read More
May 2025 The night sky this month. Galaxy season wraps up.
May is an exciting month for astronomers and skywatchers, offering captivating celestial events as galaxy season winds down and we prepare for the dar
Read More
Read More