I think that the very formulation of the problem (copy the picture to 100%for the directory) is incorrect. For the simple reason that you're still going to do before printing, color correction. Not to mention that the preview image is adjusted in Photoshop. Just after the files are ready, you need to take a hammer
and stand with him over the soul of a printer. Then, with a catalog of everything will be OK.
In general, the better the camera, the better pictures. Although I have an ordinary Canon G10. For a directory, it is certainly not good, but for the site - just right. With regard to light, for extreme cases, I have two soffit, but they can be blinded
.
Regarding how to display the light - do not bother. People this for years in institutions teach. In the correspondence on the forum this science you (with all due respect <!--~ a ~-->) not afford it.