Astrodon 1.25" LRGB Gen2 E-Serie Tru-Balance Filterset - mounted

Astrodon LRGB Gen2 E-Series Tru-Balance Filters - simplify your imaging!

The E-Series Gen2 filters were designed for cameras containing the full-frame KAF8300, KAF3200, KAF6303, KAF16200, KAF16803 sensors, as well as most Sony and back-thinned sensors.

Astrodon Generation 2 (Gen2) Tru-Balance RGB filters have revolutionized CCD imaging. Their popularity is due to their ease-of-use, high optical throughput and great resulting colors 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 red-sensitive full-frame (formerly Kodak 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% for equal length exposures. This can never be perfect, but it does allow you to take one exposure time for all of your RGB data and therefore, only just one corresponding dark exposure time. Again, this saves you precious imaging time and thus, simplifies your imaging.

Advantages of the E-Serie L-RGB Filters

1.25" mounted, 31, 36, 49.7 mm dia., 49.7 mm square

~1:1:1 color combine weights for G2V white-point for Kodak Full-Frame (E) detectors

Best choice for backthinned and Sony detectors

Equal RGB exposures and one dark time

Better color separation (spectra)

Better color rendition for galaxies based upon color theory

Significant reflection and star halo reduction (see Alnitak image)

Enhanced contrast for HII regions in galaxies

Spectral "gap" to minimize effect of light pollution

Highest efficiency blue filter with less UV

Correct "teal" OIII color for planetary nebula (OIII signal >97% in blue and green)

More parfocal - thickness 3+/-0.025 mm*

Parfocal with Astrodon´s high-performance narrowband and near-IR filters

Striae-free 1/4 wave fused silica substrates

30 arcsec parallelism

Ultra-hard and durable sputtered coatings

made in the U.S.A.