BAADER CALCIUM GEN-II FILTER 1.25" & 3.8 ASTROSOLAR FILM Camera menu It has an optical thickness

It has an optical thickness of 17

- 40° C to + 50° C

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

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

Internal Accualign illuminated polar scope

BAADER CALCIUM GEN-II FILTER 1.25" & 3.8 ASTROSOLAR FILM Camera menu It has an optical thicknessThe 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