Hello all- Thanks you very much for taking the time to read my post/question. Ive been getting into long exposure night time photography lately, using a variety of films (so far Acros and Ektar). Im struggling a little with getting a proper exposure, or at least computing for one. So, my question is ... is there anything inherently incorrect in using my DSLR as a 'polaroid' for the scene Im shooting (assuming Ill account for proper reciprocity of the film when I move to the film camera)? I ask because I was doing some long exposure black and white work last night, using a meter and computing by hand (on acros) and now that Ive developed the film, most of my shots came out significantly over exposed.... so I would like a little 'insurance' that my math is correct before I expose the film and I wasn't sure if there are other factors to account for. Thoughts? Thanks all!