All good
. If you haven't seen it, I highly recommend you (and anyone imaging with a dslr) to have a look at Scott Rosen's
website to see what can be produced using a dslr camera. Scott has a very helpful video (over 2hrs) showing a workflow where he goes through step-by-step how to process an image. See link
here. One great technique he talks about is the screen mask invert technique (thought up by Jerry Lodriguss). This enables you to bring up the faint details but limits the amount of noise introduced because you actually blur the background.