I need to use my 30 year old meter (and not used for 27 years) Guess what--the manual has gone walk about. I seem to recall using the small green circle on the lower half of the dial (rather than the larger red one or the yellow triangle) for a 35mm camera. With fresh batteries, the meter is off (using any of the above marks) and needs adjusting. How do I do this? This is hardly riveting information for the Forum so you can contact me offline--Many thanks for any help.