These exposures were taken on
manual at 1/250. The shape that the flame takes in this
crossed view is amazing. These shorter exposures show more of
what is going on with luminous plasma. F4 and 1/250 left these flames
underexposed but pretty well frozen. The exposures were not
perfectly balanced and some thermal "noise" is present.
A normal exposure of a campfire looks like this because the
streamers in the image above are averaged and layed on top of each
other:
When I adjusted I noticed a thermal image in the background. This
is because the fire is very hot and glowing in the near IR between
700 nm and 950 nm leaking though the bayer filter layers and
any IR blocking filter. There is no doubt that the gray and
purple (?) or indigo portions of the image are glowing deep red.
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