Hi all,
I've justr returned from Marrakech, and on my last day I stood on the roof of my Riad and took some 30sec exposures of the skyline. In one of them I noticed a streak accross the sky, which I assumed was a comet, however on closer inspection it in not quite what I was expecting! It seems to stop and start in pulses through the 30 seconds. Is this an artefact of the camera?? I haven't noticed it before, and I have shot comets and night skys. It was taken RAW with a Canon 5D Mk2 with 24-70mm for 30sec @ f5.6 ISO200. Here's the original shot, unprocessed and a crop of the light trail:
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