Forget em all and get Pocket Light Meter for iPhone https://itunes.apple.com/us/app/pock...381698089?mt=8
Fantastic light meter with logging ability. Takes a snapshot and loggs all info to Drop Box.. Check it out..
No I have nothing to do with this app... I like do jam about doing hand held stuff with a folding 4x5 with limited equipment.. this thing rocks..
And its like $1.99
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