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Timelapse color flickering

timelapse color colour flicker tonality problem sunrise sunset intervalometer old lens

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Cristian

Cristian

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Hi, I'm new here.  I've tried to shoot the red line of sunrise along the sea and I've done that from under a very low bridge with the penumbra, so I' ve captured some portions of the sand and palm trees too. I tried it twice but even if I shot all in manual mode I gained a color flickering between some pictures, and it occurs until ten minutes before the golden hour. My old lens is a "Nikkor 28mm 2.8 ai-s" which turns into a 42mm on my Nikon d3200 camera. 
Of course I used an intervalometer and shot in RAW. 
The first time my settings were:
  • shutter speed - 1/20, diaphragm closed to 8, iso 200, 13 minutes shoot time, 3 seconds of interval.
The second time they were:
  • shutter speed - 1/15, diaphragm closed to 11, iso 400, 25 minutes shoot time, 4 seconds of interval. 
Both times I set white balance to - direct sunlight. D-Lightning was enabled. 
Sometimes the colors change tonality, the sand becomes purple and the sky changes colour from blue/dark blue to light blue. There has been an exception though when I have set my values in another different way: 
  • shutter speed - 1/20, diaphragm closed to 5.6, iso 400, 12 minutes shoot time, 4 seconds of interval. In this last case there weren't clouds in the sky and everything was brighter, no color flickering occured.
I read that when there's no much light the camera could not interpret colours in the same way, but I find it bizzarre. Why does the camera read colors differently at every shot and why it doesn't do that in normal video mode? How can I solve this problem? 
 
I planned to make new shots outside the bridge, maybe something can change. I am hopeful it is just an incorrect setting. Is ND filter necessary? I post-process with Adobe Lightroom but when I noteced such color variations I downloaded - tlTimelapse (not LR TImelapse) - with the hope that it could resolve my problem. It was limited to lower or raiser brightness. I need to know why colours have a different tonality.
I'm just interested now in timelapses then I'm a beginner.   
 






Also tagged with one or more of these keywords: timelapse, color, colour, flicker, tonality, problem, sunrise, sunset, intervalometer, old lens