Using narrowband filters can often result in slightly dimmer images, which can be difficult to resolve to a focus. You can now use this filter to focus perfectly with a bright image and since they are also parfocal, switch to a different narrow band filter without losing the focus.
This very useful addition to the Baader filter range is intended for the luminance channel in astro imaging. Using narrowband filters can often result in slightly dimmer images, which can be difficult to resolve to a focus.
Optimized light pollution suppression filters for one shot colour CCD and modified DSLR cameras. Not only do these filters block out the majority of the light pollution, they also reduce the red cast improving on the colour balance.
Baader's new Narrowband CCD Emission Line & H-Alpha 36mm unmounted Filters with 2mm glass deliver the absolute highest contrast deep sky images in H-Alpha, Oxygen III, and Sulfur-II, with the shortest exposures possible.
With this addition, Baader offers the complete line of LRGB (plus the emission line filters H-alpha / S II /O III and H-beta, all sold separately) in unmatched quality grade, all being parfocal and made of precision optically polished glass.