Hi, I have just bought my first medium format outfit and purchased a Gossen LunaSix light meter. All my images are coming back overexposed. I just ran a test using my SLR meter vs. the LunaSix. Sometimes there is only 1/3 of a stop difference on the reading. Other times it is more pronouned. So the first my camera said 1/125 at F8, the meter said 1/125 at F9 (or F8 + 1 mark). The second test the SLR read 1/45 at F22 but the meter read 1/15 at F22. I am puzzled by the readings. Any help would be appreciated.