Baader 8.5nm H-Beta CCD Narrowband 1.25" Filter
Retail Price $160
Baader's Narrowband CCD passfilters is perfect choice for CCD imagers, able to deliver highest contrast deep sky images in H-Alpha with the shortest exposures possible. Their ultra-narrow bandwidths have extremely high transmissions, while completely rejecting light pollution as well as the important blocking of longer wavelengths.
The high optical quality of the 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. This special custom polishing operation sets Baader filters apart from the standard commercially precision polished filter substrates used by most other filter manufacturers.
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