After a lot of troubleshooting and help with Provia 100F processing from Mike Parks at Praus Productions Inc. in Rochester, NY we've come to the conclusion that my meter is not linear. The meter checks out fine with the sunny f16 rule when it is sunny out but down around EV values of 6, where I like to shoot, I end up underexposing my film by 2/3 to 1 stop. When I use my trusty F3, N80 and D40 at these low light levels they agree with each other and indicate an exposure of 1/2 to 1 stop more than what my LunaPro SBC indicates and that is what my film is telling me.
I can dial this compensation into the LunaPro at low light levels but I don't know where the meter starts working properly. I can send the meter in to be serviced but that will cost $111 plus shipping. I can use one of my SLRs or the DSLR as a meter but it is difficult for me to go from a 35mm format to 4x5, I find it interferes with my large format mindset. For now I can use my little Sekonic L208, but I find the 'null' meter in the LunaPro SBC very intuitive.
Has anyone sent their meter into Bogen for service? Any other suggestions?
Scott
previous thread:
http://www.largeformatphotography.in...ight=meter+lab
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