I'm new to pinhole cameras and just purchased an 8x10 Santa Barbara 150mm wide angle pinhole camera. I'm using Ilford rc paper and I'm still working on figuring out the correct exposure times. Everyone of my shots are overexposed in the center of the frame and underexposed on the outer edges. The overexposed areas are almost circular in shape. Is this a bad pinhole or do I just need a little more time to get the correct exposure times. Subject distances have varied.
Thanks for any help!
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