Sunny 16

Here’s a handy tip to check if your exposure metering is correct on your old car boot SLRs (or at least the reported exposure).  Known as the “Sunny 16 Rule” for reasons that will become apparent; head outside on a bright summer’s day when the sun is high in the sky.  Set your camera’s aperture to be F16, set the ISO (or ASA) setting as low as possible (100 or 125), and set your shutter speed to be 125.

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