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Astrodon CRGB E Series Gen II Filters - 2" Square - DISCONTINUED

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AN-CRGB2-E50S

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Astrodon CRGB E Series Gen II Filters - 2" Square - DISCONTINUED

Astrodon CRGB E Series Gen II Filters

Astrodon Tru-Balance RGB filters have revolutionized CCD imaging. Their popularity is due to ease-of-use, high optical throughput and great resulting color for galaxies, star clusters and nebulae. There are two varieties of Tru-Balance filters - E-Series and I-Series.

E-Series filters are designed to approximately equalize the flux of Kodak's full-frame (E-Series) CCD detectors, including compensation for the solar photon flux. This means that your RGB color combine weights will be approximately 1:1:1 within perhaps 10%. This can never be perfect, but it does allow you to take equal time exposures for your RGB data and also just one corresponding dark exposure time.

Astrodon CRGB E Series Gen II Filters Features

  • RGB filters designed to produce true color for galaxies and stars based upon a G2V (sun-like star) white point.
  • Equal exposure time for each RGB filter leads to equal fluxes and equal color weights (combine ~ 1:1:1).
  • Correct blue-green color for OIII in plane-tary nebula with 1:1:1 RGB color weights for correct star color.
  • Two LRGB designs; E-Series for full-frame, and I-Series for Interline CCDs.
  • Deep red filter in E-Series brings out HII regions in galaxies and better definition of H-alpha in emission nebula.
  • All filters transmit an amazing 98% in their passbands for the highest perform-ance available.
  • All filters are UVƒ???????? and NIR-blocked. No extra filters are needed.
  • Breakthrough design eliminates halos around bright stars.
  • Hardest optical coatings on 1/4-wave fused silica substrates for durability.
  • Coatings extend to the edge (no uncoated rims that need to be blocked) and no edge-sealing is required.
  • Light pollution suppression included in the design.
Astrodon Product Number: CRGB2-E50S

SPECIFICATIONS