A Bitter Lesson in Depth of Field
I have spent many hours photographing Burrowing Owls over the past two summers but it’s a real challenge to get clear shots of them as they typically stay on the ground and are usually at least partially obscured by vegetation. For me it’s a real coup to get one on an elevated, natural perch in good light. Last week I had a wonderful opportunity with them and simply blew it. As we approached our “owl spot” we noticed that there were three of them perched up high on a sagebrush in beautiful early morning light. I maneuvered my pickup for the best light angle I could get and to obtain separation of the owls from each other. Everything perfect. And all three birds gave us a variety of interesting poses for several minutes. I had noticed that the owl on the left was perhaps a foot (or slightly less) closer to us than the other two birds so I was concerned about depth of field. I seldom shoot multiple subjects and typically with only one bird I’m shooting at f/6.1 – f/8 depending on the situation. Knowing I needed more DOF here I dialed in f/13 thinking that would be plenty to get all three birds sharp. The image below is typical of the results I got. Burrowing Owl – Canon 7D, 500 f/4, 1.4 tc, 1/200, f/13, ISO 500, cropped to 77% of original image The owl on the left is noticeably soft. That is quite apparent at a larger image size, say 1200 pixels, though not quite so obvious at this…