Was playing around tonight with a grey card and decided to mock up a Zone Ruler. This is what I came up with for my camera. Canon EOS 7D, EF 35mm f/2.0 Lens, ISO 100.

What’s interesting about this is that 18% Grey, Zone 5 is 4 stops from White with no detail and 5 stops from Black with no detail. The dynamic range is apparently 10 stops, nice.

Interestingly enough, looking at the RGB numbers, there appears to be a slight colour cast. I wonder if that is an artifact of AWB’ing artificial light – a mix of CFL and Tungsten. I guess I’ll have to try this again tomorrow with natural light and see if there’s a difference.

For today, that’s what’s in my

Line of Sight