Reciprocity for ERA in 4x5 or 8x10

[rwyoung]

Been Googling around and I haven't found quite what I'm looking for.

Suggestions for reciprocity failure corrections for ERA sheet film in 4x5 or 8x10? Until I do some testing I was going to use the data from FP4+ as a starting point.

Been playing around with pinhole cameras a lot lately and I'd like to use some of the ERA stashed in the fridge.

[philbed]

According to my test, the ERA film is very close to the FP4 even for the reciprocity failure.