Dramatic lenticular clouds often form above high mountain peaks. This is spectacular Mt. Fitzroy in Patagonia. My photo tour group and I were right in front of the mountain, so my focal length was only 170mm. It had snowed at the higher elevations the night before, and the white peaks in combination with the amazing clouds made a stunning landscape. When all the elements in a scene are beyond what I call ‘optical infinity’ -- i.e. the point where the lens can’t be focused any further -- depth of field becomes irrelevant. In other words, I could have taken this shot at f/4 or f/16. The focus throughout the image would be the same. My settings were 1/4000, f/5.0, and 400 ISO.
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