A unique filter for many different astronomical tasks. Incomparable in accracy to combinations of generic colour filters made of raw polished glass – where surface inaccuracy adds up in the optical wave front to an unbearable degree!
The high optical quality of Baader narrowband filters guarantees no loss in sharpness or contrast. Each substrate is fine-optically polished plane parallel to deliver a smooth and accurate 1/4 wavefront over the entire surface.
With all substrates fineoptically polished. These filters by far supersede the mediocre quality of common `flame polished` color filters. Fineoptical polish and 2 mm thickness allows these filters to be inserted anywhere into the optical path without introducing astigmatism or other defects.
2 Rosemary Lane, Sutton nr. Ely, Cambridgeshire, CB6 2NZ Telephone Hours: Monday to Friday - 10:00am-4:00pm Our showroom is currently closed for visits until further notice. Phone lines and e-mails are open as usual.
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