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Try 1st,
Are you running the cables near pwm cables for the dew heater?
2nd
Are you shooting direct from live view? as I have had artifacts when I shoot long exposure direct from live view, I turn off live view before starting an exposure and I no longer have artifacts. This will ony work on the diagonal red artifact on the left hand side of frame. The other artifact at the bottom has me stumped.
Brett
Last edited by bert; 17-08-2009 at 01:22 PM.
Reason: clarification
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