BAADER O-III 9nm SUPER-G FILTER Size:2" The ESATTO 4" features 76

The ESATTO 4" features 76

its oversized secondary mirror provides a large illuminated field that is ideal for large camera sensors

high speed mode) at full resolution (8

Very accurate tracking for long exposure unguided imaging

Includes a 1

BAADER O-III 9nm SUPER-G FILTER Size:2" The ESATTO 4" features 76The Baader Oxygen III 9nm Bandpass filter is specifically designed for visual observation of planetary nebulae and supernova remnants under bright skies as well as imaging with colour CCD and CMOS cameras. Much like the H alpha 20nm filter, the O III Super G filter acts as an exceptional high contrast Green filter for RGB imaging with both mono and colour cameras. While regular green filters suffer from bad seeing due to air turbulence, this filter's