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200 lpm diffraction grating in front of Leica D-Lux type 109
This is a single frame from a video ( https://www.dropbox.com/s/sgb78mg2o8g2jdj/Flash%20spectrum%202017%202.mp4?dl=0) of the flash spectrum. It shows the transition from the emission lines of the chromosphere to the continuum of the photosphere.