Baader Semi Apo Filter 1.25" 25" size focuser - compatible

25" size focuser - compatible with almost all standard accessories

This curvature causes stars that are imaged at the edge of the field of view to be less sharp

CNC machined aluminium for a superior fit and finish

Ideal for both visual observation and astrophotography

Corrector  without Eyepiece adaptor 1

Baader Semi Apo Filter 1.25" 25" size focuser - compatibleDescription A filter that removes the need to combine the Neodymium Moon and Skyglow filter with the Fringe Killers to deliver an amazing colour corrected image to achromatic refractors. The Baader Semi Apo does it all in one filter. Baader Semi Apo Filter against violet fringes of refractors 1. 25" cell By selectively filtering out of those parts of the spectrum where the false colour of achromatic refractors is significant, this disturbing effect is