Observed arrival · 2026-09-05
HELION, the eclipse-corona RAW processor
A specialized tool turns a bracket of solar-eclipse camera RAW files into a calibrated, merged image of the corona.
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The workflow starts with a fixed-camera RAW bracket and calibration frames rather than a finished photograph. The page describes alignment on the corona, exposure merging, twilight-sky removal and enhancement of faint structures, with PNG, JPEG and scene-linear DNG outputs. Its examples span six eclipses from 2017 through 2026, including a 1/320-second-to-3-second exposure cycle covering a factor of 960.
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