Like new: Baader L-RGB CCD Filter Set - 4 Filters - 1.25" Filter Cell
The # 2458472 filter set consists of a UV/IR blocking filter and the R-G-B filter set.
# BA2458472: The filters are new, but the plastic transport packaging is not the original one. Filter size 1.25" mounted - filter thickness 2 mm Set consisting of luminance filter (UV/IR) and R-G-B filter set High-quality anti-reflective coating, thereby scattered light and reflections are reduced to a previously unknown level Steep edges for maximum contrast and best possible suppression of artificial light illumination Balanced RGB design allows color channels to be captured with the same exposure time Each filter is supplied in a high-quality stackable filter box.
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- Technical data..
- In the box..
- Manufacturer infos..
- Safety informations..
Baader Planetarium L-RGB CCD Filter Set
This filter set is for astrophotographers who want to expose each color channel individually and get the most out of the sky. The UV/IR filter is for the luminance image. The RGB filters are for the individual color channels.
The filter set consists of Luminance interference filter (UV-IR blocking filter) Interference filter Green
General information about Baader CCD filters:
Baader filters are manufactured with the highest precision. Great importance is attached to freedom from reflections and to the accuracy of the surfaces. Each filter is polished to an accuracy of 1/4 Lambda on both sides with Autodeck polishing machines before the filters are subjected to an elaborate coating process. The result is age-resistant filters with the highest accuracy.
Baader´s RGB filters are not just simple color filters, they are special filters with the highest possible light transmission in the respective areas and with the steepest possible edges, so that only the desired light range really gets through. This allows the decisive areas to be photographed with the highest contrast and high quality.
The result is a better color weighting of the image with more intensive contrast - already on the raw image!
The Baader RGB filters are very effective under a light-polluted sky, because a large area of pollution (mercury and sodium vapour lamps) is omitted.
Mechanical properties:
the only filters with homofocally plane-polished substrates. Each individual filter is fine-optically polished to 1/4 wavelength Baader LRGBC filters are hardcoated separately. The individual filters are not drilled out of large plates as usual. drilled-out filters show micro cracks at the edge of the coating layer, which tend to absorb moisture due to capillary action all Baader filters have sealed edges due to individual coating, so moisture penetration is impossible Baader filters were boiled in water for one hour during long-term ageing tests (for example at B+W Filter/Schneider Kreuznach) and, in contrast to drilled filters, remained completely undamaged. scratch-resistant hard coatings of Baader filters can be cleaned as often as required - preferably with Baader OpticalWonder cleaning liquid
Optical properties (no reflections in comparison to competing RGB filters):
Balanced RGB design allows images with the same exposure time - extremely important for automated continous imaging Maximum color contrast for each of the three RGB channels due to extremely steep edges at all transmission curves [O III] emission line is doubly weighted in the B and G channels, with maximum transmission - for highest deep-sky quantum yield R-Filter provides maximum transmission and contrast at H-alpha and [S II] but blocks IR from 680 to 1200 nm Blocking between G and R filters reduces light pollution from mercury and sodium vapor lamps at 580 nm, darkens sky background and improves color balance and separation
The filter curve of the RGB filters:
The filter curve of the L filters:
Filter design: | interference filter |
Edges: | sealed, no intrusion of moisture |
Polish: | fine-optical plano-polish, 1/4 lambda |
Coating: | hard-coated, scratch-proof |
Substrate thickness: | 2 mm |
Dimensions: | Round filter, 1.25" cell |
4 Filters 1.25" in individual protective cases: Interference Filter Luminance (UV/IR cut) Interference Filter Green
Manufacturer / Importeur: | Baader Planetarium GmbH |
Street: | Zur Sternwarte |
ZIP / City: | 82291 Mammendorf |
Country: | Germany |
Telefon number: | +49 8145 80890 |
Email: | kontakt@baader-planetarium.de |
Website: | www.baader-planetarium.com |
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Reviews
Written by Robert Meixner
on 2019-10-12
"Alles bestens - hervorragender Filtersatz"
Written by Malte Kreklau
on 2017-09-05
"Fehlerfreie Abbildung aller Filter.Wie erwartet"
Written by Peter Csordas
on 2016-05-03