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Baader 2" Infrared blocking filter for CCD - UV/IR cut and luminance filter

82,35 EUR
excl. VAT
excl. 4,54 € Shipping costs


Baader 2

L Filter (UV/IR cut filter) - 2" # 2459210A

-- with cell / plano-optically polished / with anti-reflective coating
-- parfocal to other Baader filters (2 mm thick)

For the luminance channel at LRGB photography.

The filter comes in a robust plastic box for gentle and dust-proof storage.

The luminance filter's transmission curve:

Baader UV/IR cut filter transmission curve

Mechanical characteristics:
  • the only filters with homofocal plano-polished substrate. Every single filter is fine optically polished to 1/4 wave length.
  • Baader LRGBC-Filters are hard coated separately. The individual filter is not bored out of a big plate.
  • sFilters who are bored out have micro fissures in the rim of their coatings. They tend so soak humidity because of the fissure's capillar characteristic.
  • All Baader filters have sealed coating rims because of their individual treatment. Intrusion of humidity is impossible.
  • In a long-term ageing test scheme, Baader filters were stored in boiling water for one hour (e.g. at B+W filters and Schneider Kreuznach) and remained (in opposite to bored filters) absolutely intact.
  • The Baader filter's scratch-proof hard coatings can be cleanded often - preferably with Baader optical wonder cleaning fluid.
Optical characteristics: no reflections compared with competing RGB filters.
  • Balanced RGB design allows photos with equal integration time - important for automatised series.
  • Maxium colour contrast by extremely steep transmission curve edges.
  • [O III] Emission linie is double weighted in the B and G channel - for maximum Deep Sky quantum efficience.
  • R-Filter delivers maximum transmission and contrast at H-alpha and [S II], but blocks IR from 680 to 1200 nm.
  • Blocking between G and R channel reduces light pollution of mercury and sodium vapor lamps at 580 nm thus darkening the skies background and improves color balance and separation.

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Customer reviews:

Author: han Kleijn, 25.02.2017
Evaluation: TEXT_OF_5_STARS

"Good no problems. Optical good. Much better then faulty TSIR2 (oval stars) which I returned."


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