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G'day g__day, gbeal,
Yes, ED80, I'm surprised to get vignetting, will need to enlist the aid of a flat field, but one problem at a time.
On checking back, yes the lines were present in earlier captures. The milk splask image (eta carina) was downloaded with a 90deg rotate and only ISO 100 so the lines were less prominent, and more or less vertical. That rules out the power supply and points the finger at the usb cable.
I have the main camera and the guide camera cables loomed together to avoide guide error issues; maybe I need to use some ferrite clamps or bobbins to suppress noise radiations.
The power cable is not all that close to the usb cable (opposite ends of camera body from mmemory) but it is incorporated into the same cable loom as the signal cables. But the lines are there pre power supply kit days, so........
cheers,
Doug
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