BAADER SEMI APO FILTER Size:2" 4 kg included Dovetail saddle

4 kg included Dovetail saddle

25"- 11" Schmidt-Cassegrain telescopes comprises of a 495mm PLUS Losmandy bar and PLUS radius blocks and can be easily installed either above or below Celestron C9

EQ8 Pro (all variants)

ARCO Manual (English)  ARCO Manual (Italian)

or it is made coating the middle of the meniscus

BAADER SEMI APO FILTER Size:2" 4 kg included Dovetail saddleThe Baader Semi APO filter combines both the Neodymium Skyglow and Fringe Killer filters into one. The result is a filter that drastically increases contrast and cuts out the blue and NIR ends of the spectrum, eliminating false colour present in many achromatic refractors. As most budget refractors are not very well corrected at these wavelengths, this filter allows you to make the most of the optics without changing the overall colour of the image.