Baader's new narrowband filters offer excellent contrast and image sharpness for CCD imaging in H-Alpha, H-Beta, O-III and S-II while at the same time minimizing the necessary exposure time. This is achieved by an extremely narrow bandwidth with maximum possible transmission. The filters completely block out unwanted background illumination.
The filters' high optical quality guarantees excellent sharpness and contrast. Each substrate is precisely polished in order to guarantee that both filter surfaces are precisely parallel and have a surface precision of 1/4 wave over the entire surface. This is what sets Baader's filters apart from most other filter manufacturers. All filters have a state-of-the-art coating to guarantee that the bandwidth is properly centered around the correct wavelength and to maximize transmission. An ultra-hard surface coating offers protection against aging and mechanical influences.
The filter is very well suited for advanced CCD imaging.
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