Baader Calcium GEN-II Filter

The new Baader Calcium GEN-II filter lets you observe the interesting border region between the photosphere, visible in white light, and the sun's chromosphere, exclusive to narrow-band H-alpha filters.

Enhanced Solar Detail with Baader Calcium GEN-II

In addition to familiar structures like sunspots, this filter allows you to see the chromospheric network across the sun's surface, supergranulation cells, and Ellerman Bombs. These features enhance your solar observation experience.

Safety Notice: Camera-Only Observations

Since the calcium emission line at 394 nm is in the near UV, this filter is for camera use only. Warning: Never use this filter for direct visual observation, as harmful UV radiation can damage the eye.

Optimal Camera and Telescope Pairing

The Baader Calcium GEN-II Filter performs best with monochrome cameras and mirror telescopes. While refractors with fast f/ratios may not be optimized for this part of the spectrum, they can still yield excellent results. Note that unmodified DSLRs may require extended exposure times.

Compatible Solar Filters and Accessories

All calcium filters need an additional solar filter. The Baader GEN-II package includes a sheet of AstroSolar Photo Film OD 3.8 (20×30 cm), so you can build a solar filter without additional purchases. Options like the BDSF Baader Digital Solar Filter OD 3.8 and Herschel prisms are also compatible.

Upgraded from K-Line Filter

The Calcium GEN-II Filter replaces the older K-Line Filter, offering improved quality with a narrower half-bandwidth of 5 nm. A single filter is now sufficient, eliminating the need for stacked filters and making it easier to use in filter wheels.

Product Features and Benefits

• CMOS-optimized for increased contrast and matched quantum efficiency
• Reflex-Blocker™ coatings for freedom from halos under all conditions
• Standard thickness for parfocality, with blackened edges for minimal reflection
• Life-Coat™ hard coatings for durability in adverse environments

Experience unmatched solar imaging with the Baader Calcium GEN-II Filter, crafted for professional-grade solar observation and photography.