This was a really unique situation. The giraffe kept walking closer and closer to the lion, as if taunting him, and the lion simply paid no attention. My guide told me that this was the giraffe's technique of communicating to the predator that there was no point in attacking because his presence was already detected and the element of surprise was gone. To shoot this, I knew I had to have enough depth of field so both subjects were in focus. I was using a 100-400mm lens set to 100mm, and if I focused on the lion, which was correct, the giraffe would be a bit soft unless I used a small enough lens aperture. So, I chose f/11 on aperture priority, and that gave me 1/1000th of a second with 320 ISO. Had I been using a focal length of, say, 300mm with its inherent reduced depth of field, then I would have closed the lens down to f/16 or even f/22 to make sure both animals were sharp. Whenever you have two subjects, they both must be sharp.
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