Our labs were in Fortran. But similiar scenario

I've been testing out my 10D and ISO 100 and 200 are similar but I can really start to see noise at 400 and up.

I will be shooting the interior of a 17,000 sf house in an hour and a half for the designer. I'm afraid that I will have to shoot at at least ISO 400 and pull out all my tricks - wiiiiiide angle, remote release, multiple lighting, and heavy tripod.

I'll try post a few results when I get back.