BAADER DOUBLE STACKED K-LINE 1.25″ FILTER WITH BAADER ND3.8 ASTROSOLAR FILM

Warning: for photographic imaging only. Never look into the sun with the K-Line filter without an additional OD-reduction filter.

• For solar work use only with 3.8 AstroSolar 200x290mm Photo Film (included)
• never use any eyepiece filter for solar observation without objective front filter
• non-ageing sealed coating edges

Specifications:

• WEIGHT (KG)  -  0.027
• TRANSMISSION RANGE  -  CaK-II
• FILTER THICKNESS (WITHOUT CELL)  -  2 mm
• HBW (HALFBANDWIDTH)  -  8nm
• CWL (CENTRAL WAVELENGTH)  -  394 nm
• AR-COATING  -  dielectrically coated, planeoptically polished
• SPECIAL FEATURES  -  double stacked
• FILTER SIZE  -  1 25 inch
• FILTER USAGE  -  Solar
• FILTER MOUNTED  -  Mounted (classic 8mm)
• TYPE OF FILTER  -  Narrowband
• SINGLE OR SET?  -  Single Filter
• FILTER SHAPE  -  round