Description
- 1¼" x 2 mm Baader H-Beta Narrowband Filter – Precision Grade – with 1¼" (28,5 mm) filter thread
- 5.5 nm FWHM, recommended for optical systems from f/10 to f/3.5
- Reflex-Blocker™ hard coated and plane optically polished – with sealed coating edges (Life-Coat™)
- Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
- Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies
- Mounted in Baader Low Profile Filter Cell (LPFC) – 6 mm height