Description
- Single filter (unstacked!), shows finest solar details in calcium K (Cak) lightFor solar photography only in combination with enclosed AstroSolar photo film ND3.8 or a Herschel prism (sold separately: Baader Safety CoolCeramic Herschel Prism 2" Photographic (#2956510P.
- Enhanced contrast matched to quantum efficiency and s/n ratio of typical CMOS cameras.
- Reflex-Blocker™ coatings, for maximum immunity to retro-reflection from nearest auxiliary optics, even under the most adverse conditions
- Identical filter thickness to existing standards, with utmost care for homosociality
- 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
- Supplied with AstroSolar photo film ND 3.8, size: 200 x 290 mm - for pre-filtering sunlight
- The calcium filter Gen-II must NOT be used in the light path WITHOUT pre-filtering.
- Visual observation is not possible with the calcium filter, as the eye is practically blind in this part of the spectrum.
- Never point the telescope directly at the sun with only the calcium filter (without an additional attenuation filter).
