I was out in Saturday making some landscape images. I used a spot meter to measure the area I visualised as zone III and set an exposure of two stops less on the camera. To make the initial print, I exposed a test strip of the film rebate against a portion of empty carrier to determine maximum black. I then made the print at grade 2 using the same time for max black. The zone III came out too dark, more like zoneII. Assuming my choice of Zone III was sound, does this suggest my meter is prone to over, or under exposure? I have tried, but can't figure this out in my head! Alex