I have one of these meters that I would like to use with my Bessa 6x9 folder. I don't have a manual, so I'm not entirely sure it usage. Obviously I set the ASA by rotating the middle ring. I take the reading (incident or reflected depending on position of the flap covering the cells) by identifying the black or silver bar, but I'm not sure what I'm supposed to line up with that bar on the outer ring? the thick black lines? (I'm guessing the red lines are for cine) But there is also that dot to the left of the lines. Anyone with experience with this meter (or a pdf of the manual)?