Used to use a SEI Photometer back in the early 1970s. Remember calling up Fred Picker and discussing with him how to use the meter with the Zone system. He sent me a copy of how he used his SEI. It was good starting point that I personalized in a short while. Well Fred, the instructions he sent me, and my notes on how I used my SEI are all long gone.

Just purchased a working SEI Photometer and want to start using it once the weather warms up (-15 degrees F last night). Anyone else out there use an SEI?