by ʇolɐǝz ǝɥʇ qoq

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The answers given by whuber and Matt Grum are correct, pointing out the flicker problem and some workarounds. My addendum comes 6 years after, where we are now beginning to see some real solutions to the lamp flicker problem: New cameras such as the Canon EOS 7D Mark II and 80D introduced an anti-flicker shooting mode. The camera uses the metering sensor ...


A quick read of the manual and specs suggests that camera doesn't have a bulb mode (which allows you to open the shutter for long periods), and the slowest shutter speed is 30 seconds in 'starry night' mode.

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