Filtro H-alfa Baader SunDancer II

Baader SunDancer II H-alpha Filter, 0.60 +/-0.1 Angström. Il Baader SunDancer II (con H-alpha Etalon riscaldato di SolarSpectrum) trasforma rapidamente e facilmente un telescopio esistente in un telescopio H-alpha professionale!Per telescopi fino a 80 mm di apertura, non sono necessari ulteriori accessori

• Silently heated H-alpha-Filter with integrated 3x telecentric system with 2nm block filter.
• Half-width (FWHM) of 0.6±0.1Å at an effective focal ratio of f/30
• Resistant to ageing: The dielectric coating of the blocking filter and the airtight storage of the SolarSpectrum Etalon filter in oil prevent the ageing process
• The complete disk of the sun as well as prominences are visible in telescope with focal lengths up to about 600mm
• shows prominences and solar surface details for visual observations as well as for photography and bino-viewers
• For telescope with 80mm aperture or less, no additional D-ERF (energy rejection filter) is necessary
• Userfriendly electrical temperature control; additional micrometer screw for observiong fast changes in the blue wing of the H-alpha-line
• Nosepiece: 2", 1,25"