- 2″ x 2 mm Baader CMOS H-alpha / O-III / S-II f/2 Highspeed Filter Set – Precision Grade – with 2″ (M48) filter thread
- 6.5 nm FWHM, recommended for extremely fast optical systems from f/3.4 to f/1.8
- Specially designed for the special filter requirements when used with fast optics like the Celestron RASA astrographs
- Reflex-Blocker™ hard coated and planeoptically 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
$119.00
