BAADER H-ALPHA 20nm BANDPASS FILTER greenline 76 µm Effective image area

76 µm Effective image area 44 mm x 33 mm

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The Geoptik grease kit includes 2 types of grease for the lubrication of your mount

Maximum thickness of the filter 3 - 4 mm Optical thickness 16 mm

The 2" Crayford focuser features a dual-speed (10:1) reduction for precise

BAADER H-ALPHA 20nm BANDPASS FILTER greenline 76 µm Effective image areaThe Baader H Alpha 20nm Bandpass filter is specifically designed for visual observation of faint emission nebulae under bright skies as well as imaging with colour CCD and CMOS cameras. Much like the Super G O III filter, the 20nm H alpha filter acts as an exceptional high contrast H alpha Red filter for RGB imaging with both mono and colour cameras. With highly efficient UV IR blocking out to 1400nm, this filter helps reduce blurring caused by