I can get four to five layers on these big files before I blow out of memory. Fortunately I rarely need that many. But remember, these are 4x the size of even the D800's files - I should be able to get 18-20 layers with a D800. I know that's not enough for some folks, but for most of us that's plenty.
_____ Brian... a bicoastal Nikonian and Team Member
My gallery is online. Comments and critique welcomed any time!