As always it was difficult finding a sunny day, particularly one where time allowed concentrate on the subject but I took an series of images of my garage which I hope fulfilled the criteria.
The right garage door gave me the area where I could set the highlights, with adequate shadows within the garage to look for noise. I decided to put a grey card in the shot which would allow me to ensure accurate colour correction.
The garage door ans initial shot was taken at the following settings:
- Av - f/22
- Tv - 0.6s
- ISO - 100
- Lens - Canon 24 / 70 @ 32mm
After taking the image, with the camera on manual, I changed the exposure metering to spot and took additional readings at different parts of the photograph as show below.
This done, I opened the image in Photoshop and, after zooming in on selected areas, found the exposure level with noise started at f/5.6.
I have marked the areas within the image where noise was evident.
I therefore think that the Dynamic Range of my camera, Canon 5D MkII, is the difference between f/5.6 and f/22 giving a value of 5 stops.
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