BAADER CALCIUM GEN-II FILTER 1.25" & 3.8 ASTROSOLAR FILM Camera menu The ultra-narrow 3

The ultra-narrow 3

belt flexure and friction forces show in the declination axis

It has an optical thickness of 17

If you plan to reuse the alignment later (for example if you are in an observatory)

for very low temperatures (-30°C): contact us for more details Communication ports RS–232 port

BAADER CALCIUM GEN-II FILTER 1.25" & 3.8 ASTROSOLAR FILM Camera menu The ultra-narrow 3The Generation II Baader K Line filter is designed for photographic solar imaging of the Calcium K and H lines and must be used with the included AstroSolar OD 3. 8 film. This second generation version of the filter has a narrower half bandwidth of 5nm centred around 394nm and newly designed coatings which makes photography of the boundary layer between photosphere and chromosphere possible. As the human eye is damaged at these wavelengths, the Baader