why is the products not much bright??
The show contained a good quantity of kamuros, containing delicate gold stars, sometimes with a twinkling effect, and horsetails, which dump long-burning golden stars slightly upwards for them to fall in a horsetail pattern.
These effects are quite dim compared to color shells, so this might explain the dimness you observed.
I also set the exposure a little too dark on my own video, so combined with the effects described above, this made for a very dark video at times !
Unfortunately, this was almost the perfect exposure for the excellent color shells. I have developed a theory that you need 3 or 4 cameras to properly film a pyrotechnic display, and the Japanese entry proves my point somewhat...
For starters, if you don't want to alter the exposure on the same camera all the time, you need one set darker than the other to catch both the vivid color effects without overexposing and the golden ones without drowning them in the night sky due to insufficient sensitivity.
A medium setting between these two extremes will overexpose on the brighter shells and may not solve the problem of the kamuros and the horsetails being not bright enough.
STL |