I lost my instruction book for my Luna Pro and I believe that the meter is off c alibration...this assumption is based on a duplicate reading taken from another photographer's meter and I haven't used mine in almost 10 years. The battery is good. My instincts tell me to measure a grey card in sunlight i.e., f16 @ 250 AS A 250 - hm-m-m or is it f22???? You can see why I'm asking...a little rusty! Any thoughts??? Does Gossen have this info on-line?
Bookmarks