Sunny 16 rule ... not optimal at 16?

Started Jul 1, 2013 | Discussions thread
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Re: Sunny 16 rule ... not optimal at 16?
In reply to Cailean Gallimore, Jul 1, 2013

Each full F stop is half as much brightness, ideally. So, if sunny enough for 1/100th at ISO 100 and F16, exposure will also be good at 1/200th at F11, or 1/400 at F8, or 1/800th at F5.6, etc.

Similarly, it would be 1/800th at F8 and 200 ISO.

This works well for changes of shutter speed and aperture... however, it doesn't always work that well for changes of ISO, because camera manufacturers often lie (hrm... I mean, aren't that accurate) about their ISO.

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