For anyone familiar with macro lenses, I'm wondering if there is a blanket formula for compensation. I'm trying to understand exposure compensation for older lenses.
I'm not sure that I understand the magnification ratio in real terms. I believe that the idea is that if you are magnifying something at 100%, or 1:1, you compensate by opening up 2 stops. Or if you magnifiying the object by 200%, getting closer, or 2:1, then you open up 3 1/3 stops. Is this the idea?
If there is another way of explaining magnification ratio and exposure compensation, I'd appreciate it. Thanks.
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