The Baader Planetarium LRGBC CCD Filter Set conveys enhanced color separation and picture quality without irritating halos. Baader has made magnificent CCD channels through a broad coating stack design and testing program. Baader has partnered with the world's leading thin film coating manufacturer to create transmission curves that border on the ideal. Basically - Baader's LRGBC anti-reflection filters deliver enhanced pictures for your astro-imaging! Tragically , their excellent changes will probably cause numerous astro-imagers to re-take pictures of their favorite celestial objects. This set contains five round 2" filters: one each of red, green, and blue colors, plus a UV/IR-Cut filter (luminance), and one Clear precision-polished filter.
Their ultra steep cutoffs and high transmission, >95% permits Baader to accomplish something no other RGB filter set has - they can adequately isolate the essential H-Beta and O-III lines. The Baader Blue filter passes essentially the majority of the H-Beta lines, while the Green filter can catch almost all of the O-III line, without infringing into the H-Beta line. None of the light is wasted by either filter. In this way, O-III is represented as it should be, a teal (blue-green) color, and H-Beta is captured solely in the blue. This novel degree of separation is achieved, along with high transmission for both lines. Also, the Green and Red filter passbands almost touch, leaving just a sharp notch to block out the primary Mercury/Sodium light pollution line at 580 nm. The high transmission everywhere else delivers the shortest combined exposures possible with every detector.
The high optical nature of the Baader narrowband filters ensures no loss in sharpness or contrast. Every substrate is fine-optically polished plane parallel to convey a smooth and precise 1/4 wavefront over the whole surface. Each filter is blocked and individually polished, not remove and cut out of a bigger plate of glass. The extraordinary custom polishing operation separates Baader filters from other filter makers.
Coatings are professionally connected to each Baader CCD filter by the most complex hardware accessible today, guaranteeing high consistency for bandpass cutoffs, transmission, and out of band blocking. The anti-reflection coatings are uniformly balanced on both sides of the filters to decrease surface stresses and prevent substrate deformation. The ultra-hard ion beam deposition guarantees the coatings will never degrade from use or typical cleaning. Baader individually coats each LRGBC filter. Baader filters remain sealed at their coating edges for a long life without degradation. Although being more expensive, this process avoids coating failures resulting when filters are "biscuit cut" from bulk-coated sheet glass, leaving ragged edges for moisture to penetrate, and cause coatings to peel. Baader filters are intended for a lifetime of real-world use!
|Name||Baader Planetarium - 2" LRGBC Filters - UV/IR Cut L-Filter and Clear Filter|
|Manufacturer Part No||FLRGBC-2|