To drop a 300 DPI file into FCP is going to cause you problems. You’re more subject to issues with flickering and moire. It also taxes your processors more than they need to.
If images are scanned at high res, say 300 DPI, don’t just leave them that way. Bring them into Photoshop first. They should be optimized in Photoshop with the frame size you need (usually 2x the native frame size of your sequence). The bit depth should be set at 72 DPI before saving them, and then should be placed them into the timeline.
This info comes from my training at Avid Boot Camp oh those many years ago.
Kevin Monahan
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