What’s wrong with this picture?
L
ook at this picture closely. Enlarge the page on your device and you can see that the eyes are not tack sharp. The autofocus locked onto the middle of the orangutan’s face -- that large upper lip -- and because the light level was low in the Borneo jungle and I used a 100-400mm lens for the shot, the depth of field wasn’t enough to cover the hair on the chin plus the eyes. I was shooting at f/11 because I was aware that this angle made it tough to get the kind of DOF I needed, but as it turned out, f/11 wasn’t enough. The problem, though was the low light level. I was already at 6400 ISO. So, to gain more depth of field, I had two choices: I could either choose a smaller lens aperture which would force the ISO to be higher (I didn’t want to change the shutter speed of 1/250 for fear of blurring the orangutan), or I could have
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