Astrodon 31mm LRGB Gen2 I-Serie Tru-Balance Filterset - unmounted
Astrodon I-Series L-RGB Filters for better colors with Kodak Interline Sensors
Set of 4 Filters L-RGB - 31mm unmounted Better colors with Interline KAI11002, KAI16000 Astrodon filters are coated to the edge
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Astrodon Generation 2 Tru-Balance I Serie Filters
I-Series filters are designed to approximately equalize the flux of Interline CCD detectors (formerly Kodak), including compensation for the solar photon flux. The I-Series filters compensate for the lower red response of these Interline detectors affecting the design of the Green and Red filters. The Luminance and Blue filters are the same as those in our E-Series. 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 I-Serie L-RGB Filters
1.25" mounted, 31, 36, 49.7 mm dia., ~1:1:1 color combine weights for G2V white-point for Kodak Interline (I) 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 Ultra-hard and durable sputtered coatings
Size: | 31mm unmounted |
Coating: | Ultra-hard and durable sputtered coatings coated to the edge of each filter |
Thickness: | 3 mm |