NPB - Narrow Pass Band Nebula (496BP22) 1.25" Astronomy Filter
SKU: XAF-NPB125
An ultra high contrast type of filter that is very effective for small and fainter emission planetary nebula, as well as a variety of bright nebula, especially through larger scopes. 1.25 inch diameter.
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Narrow Pass Band Nebula (NPB) Filter - 496BP22
Spectral Curves
The spectral curve and ascii data is a typical representation of this filter’s performance, but will vary due to production and design variations. Omega only guarantees this part to meet the product specifications listed. The displayed OD is calculated from a %T measurement. The blocking regions are likely higher OD than what is displayed here. To learn more about the challenges of measuring high OD values, see our paper.
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Detailed Specifications
| Center Wavelength (nm) |
496.00
|
| Center Wavelength Tolerance (nm) |
+4/-4
|
| FWHM Bandwidth (nm) |
23.00
|
| FWHM Bandwidth Tolerance (nm) |
+5/-2
|
| Transmission |
≥90% peak
|
| Blocking |
≥ OD2 540-590nm
|
| Transmitted Wavefront Distortion |
≤ 3 waves
|
| Angle of Incidence |
0
|
| Minimum Surface Quality |
Assembly per MIL-C-48497A (F scratch/ F Dig)
|
| Coating Type |
Surface Coating
|
| Filter Type |
Bandpass
|
| Filter Application |
Astronomy
|
| Fluorescence Component |
Astronomy
|
| Flatness |
ns
|
| Parallelism |
≤ 1 arc minute
|