Features: (Moon & Skyglow). polished (!). Baader planetary colour filters. The smaller details on craters of the Moon and planetary surfaces are so much more visible! SEMI APO FILTER 1.25”. The fine-optical polish and absence of wedge error in the glass ensure perfect sharpness when magnifying more than 200x – while the much cheaper “fire -polished” filter glasses destroy the optical wavefront at high mags.
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Baader 31.7mm Semi-APO Filter. Filter Type: Semi-APO Filter. The filter combines a stronger Fringe Killer coating formula with the Moon & Skyglow Neodymium substrate with a slightly stronger violet cut.
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This filter combines a stronger fringe killer coating formula with the Moon and Skyglow Neodymium substrate with a slightly stronger violet cut. This filter can be use and installed easily. The filter combines a stronger Fringe Killer coating formula with the Moon & Skyglow Neodymium substrate with a slightly stronger violet cut.
eBay