I've written an simple IPhone app that will time Long Exposures accounting for Reciprocity failure. The app contains tables for popular b&w films from manufactures as well as tables graciously provided by Don Kirby, Bruce Barnbaum and Howard Bond. You can also enter your own tables so you can enter your own data or anything you find on the net.

More info here

http://itunes.apple.com/us/app/film-...484554296?mt=8

http://www.davideisenlord.com/?page_id=788

Ike