| This five-filter SBIG filter kit consists of four 36mm unmounted round Baader Planetarium LRGB (luminance with UV and IR blocking, red, green, blue) filters for tri-color imaging, plus a parfocal Baader 36mm unmounted round 7nm passband H-alpha filter for monochrome luminance images in H-alpha of emission nebulas. The filters are designed to drop into the SBIG 5-position CFW83NF filter wheel that is part of each STF-8300 Pro Package. The 36mm diameter round filters provide optimum coverage of the 8.3 megapixel CCD chips in the STF-8300 packages.
Baader Planetarium filters are made from striae-free substrates, optically polished flat to within 1/4 wave p-v over the entire surface, and plane parallel to within 30 seconds of arc. The result is a filter that maintains the full wavefront quality of your telescope without double images or ghosting, even at high magnifications. Critical to maintaining this level of flatness are Baader's carefully balanced coating designs, which prevent coating surface stresses from warping the substrate.
Durability has always been a hallmark of Baader Planetarium filters. The multi-layer dielectric coatings are plasma assisted and Ion beam hardened using the latest technology (the coatings are harder than the glass substrate itself!). Baader filters withstand repeated real-world exposure to the elements and physical cleaning. Users need not leave their precious filters dull and dust encrusted to avoid cleaning – Baader filters may be used and cleaned without fear. Baader Filters will truly last a lifetime.
The current price for these filters when purchased separately is $395 for the LRBG set and $195 for the H-alpha.
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