I have developed a Palm software, called LF Exp, that I am using in the field to adjust the exposure for the bellows draw, filter factor and reciprocity failure.

The central idea is that the light meter info is converted using the given film's EI, and the shot's chosen aperture. As I am using several filters, each film-filter pair is factored in as well. Next, the bellows draw for the shot is entered in the calculation. Finally, if the shutter speed exceeds one second, reciprocity correction is applied.

The exposure data can be stored in the Memo pad to be printed later.

I have developed this software mainly to fit my needs, but I am happy to share it with the LF community as a donationware. Please see more (including the disclaimers) here.

I hope the moderators will be OK with this announcement.