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sunny f/16 rule I understand the sunny f/16 rule. But this works well only when the sun is behind our soulders. How to judge the exposure when sun is nearly 90 degrees to our right or left ? how much compensation should we provide? Is that compensation common for both when the sun is bright or when the sun is behind the clouds?
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John A. Lind |
You're right that the sunny-16 rule is for frontlighted subjects. For other lighting directions here are the modifications: 1. For average foreground side-lighted subjects, increase exposure by 1 stop. Assumes the subject occupies at least 2/3 to 3/4 of the viewfinder. 2. For lighting direction about halfway between front and side, increase exposure 1/3 to 1/2 stop. 3. For average foreground back-lighted subjects, increase exposure by 2 stops. 5. For average distant back-lighted subjects, increase exposure by 1 stop. 4. For average distant subjects with lighting direction about halfway between side and back, increase exposure by 1/2 stop. 6. Experience and common sense and experience "rules;" these are only starting points. If in doubt, bracket exposures! Assumptions: Hope this helps . . . -- John
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John A. Lind |
One additional assumption: e. These guidelines are intended for a "bright or hazy" sun that casts distinct shadows. - A "weak hazy" sun with soft shadow definition needs about one stop additional exposure over the sunny-16 rule. Further compensation for light direction is often unnecessary. If any is used it should be no more than half that used for bright sunlight; I don't worry about it under those conditions. - Cloudy or heavy overcast skies without shadows needs two stops additional exposure. The lighting is so diffused that compensation for light direction is unnecessary as long as the subject of interest is fully skylighted. -- John
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