BAADER C2 SWAN-BAND FILTER FOR COMETS Size:1.25" this reducer provides a large

this reducer provides a large corrected field and transforms your telescope into a true astrograph

engineered and manufactured in-house by Optiques Fullum and are available with mirrors up to 65" (165 cm) in diameter

Thickness M68 thread - Camera side 5

while the widest possible imaging field greatly facilitates the realization of variable stars

BAADER C2 SWAN-BAND FILTER FOR COMETS Size:1.25" this reducer provides a largeThe Baader C2 Swan band filter isolates the two diatomic carbon lines at 511 & 514nm, which dominate the spectrum of a comet's gas tail and plume, respectively. Unlike other Swan band filters on the market, this filter completely blocks the OIII line at 501nm and below. The C2 filter has a central wavelength of 512nm with a half width of 15nm. This makes it useful not only for cometary imaging, but as an OIII parallel filter to better remove stars