BAADER H-ALPHA 20nm BANDPASS FILTER greenline The 2" Crayford focuser features

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

The 140mm PLUS support rings are designed for optical tubes with a diameter of Ø140mm

5 kg Tube diameter 330

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76 µm Effective image area 44 mm x 33 mm

BAADER H-ALPHA 20nm BANDPASS FILTER greenline The 2" Crayford focuser featuresThe 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