BAADER PLANETARIUM
Especially designed to improve the beginners telescopes – to provide a professional replacement for the simple "dark green" Moon & Solar-Filters made of "raw polished" glass.
Temporarily Out Of Stock
Ships within 3-14 days.
In this case, there is currently zero availability of these products, which usually are kept in stock. However, it is possible that these products are available in the distribution centers of the manufacturers or other suppliers with whom we keep collaboration in Europe. So, in this case we can immediately replace the product that has been sold out. If we know in advance that the delivery time of a product (that is temporarily out of stock) exceeds 14 days, then the estimated delivery time will be written above the indication “TEMPORARILLY OUT OF STOCK”. In any case, we will contact you via e-mail or phone if a problem arises.
CONTRAST BOOSTER FILTER 1 1/4''
Planeoptically Polished and Phantom Group Coated
Discover your telescope anew – with the Baader Contrast Booster®:
A unique filter for many different astronomical tasks – incomparable in acuity to combinations of generic colour filters, made of raw polished glass – where surface inaccuracy adds up in the optical wave front to an unbearable degree. Especially designed to improve the beginners telescopes – to provide a professional replacement for the simple "dark green" Moon & Solar-Filters made of "raw polished" glass.
For Solar Observation use only in combination with Baader AstroSolar Safety Film!
Features:
The transmission line of Baader Contrast Booster®
The transmission curve shows the light transmittance in percent versus the light wavelength in nanometres. Note the high transmission for visual observations of H-alpha (98%), H-beta (87%) and OIII (82%).
In a light polluted town or city mercury and sodium vapour street lights emit at 435nm and between 570-590nm. Here the filter transmission is between 0.3 and 3%.
The Baader Contrast Booster with integrated UV / IR cut filter is both an optimal filter for visual observations as well as for CCD images from light-polluted big city and metropolitan area.
Aperture (mm) | 31.8 |
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