![]() What I DON'T understand, is what the green 'auto-range' numbers areįor, or exactly how they're used? Is this supposed to make I'll probably wait until it's dark here and see if I can go illuminate a football field or something. I could get 272ft of range (in a 60' cone) out of this $30 flash from the mid 1990's? Somehow I think not, and that I must be missing something practical and obvious. If I digital push process to ISO 12,800 f/2.0. Those should be for ISO 800 right? Were they just estimating? I got irritated and started plugging formula into excel. I think the guide is wrong on the ISO 1000 settings. ![]() ![]() what, exactly?) I was under the impression this was a manual flash.? Is there not communication required between camera and flash for this type of feature? What am I missing.?Īnd secondly. What I DON'T understand, is what the green 'auto-range' numbers are for, or exactly how they're used? Is this supposed to make something easier? From what little I could find online, the suggestion was made that the flash can 'sense' the the amount of light it has put out, and shut it self off accordingly (based on. I do grasp the concept, and can follow the guide accordingly (distance, sensitivity, aperture - if the subject is 12 feet away, and I'm using ISO 200, I set the aperture to f/5.6). On the back of it, there's this handy little chart. ![]() So I have this old manual external flash (an Achiever 115A/S, Guide Number 48).
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