H-beta bandpass filter FWHM 4Å (0.4nm)

Ultra narrow sub-nanometer bandpass H-beta interference filter for self made prominence viewer. For safe use and blocking of further spectral ranges is a prefilter required (example Baader H-beta CCD).

H-beta filter FWHM 4A

- Diameter 25.4mm +0/-0.4mm
- Free aperture 22mm
- FWHM 4A
- Blocking range +/-15% OD5 @486.13nm
- Image quality +AR coating
- T-mount filter holder with tilting function

Price:
4A H-beta filter...
495.- EUR
T2 tilting mount....95.-
EUR