I've recently had some interst in an image of mine that is on a 35mm slide. The company would like to put it on a poster (24" x 36") and requested a 400MB file. I went to my local lab and they said they could go as big as around 70MB (and did for about $25 without getting permisssion from me).
Is this a reasonable request from a publisher? Is the file size even "doable"? Can it be done for less than a fortune, and by who?
Thanks,
Phil