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Message: <blockquote data-quote="hark" data-source="post: 781889" data-attributes="member: 13196">As Fred mentioned, what you need is to learn about depth of field. Your aperture controls the depth of field. Other things that factor into depth of field are the focal length used as well as how close you are to your subject. I really like this app called Simple DoF (a paid app) because of how it illustrates the differences. Let's say you are using a D7200 with a 70-200mm f/4 lens. First you choose the body. Then you choose your focal length (I chose 150mm here). When you change the aperture (in this case f/4 and f/10 are shown), you will see the depth of field range change. This particular example is with you standing 35 feet from your subject. The first diagram shows the area that will be in reasonably sharp focus is 2'7.46" in total (two feet 7.46") when focusing 1/3 of the way into your subject. The only difference compared with the second diagram is switching to f/10. Now the entire area that will be in reasonably sharp focus is a larger distance of 6'7.87" (six feet 7.87"). When you focus and want the greatest amount of depth of field, choose a smaller aperture (higher number f/stop) and focus about 1/3 of the way into your subject. The closer you are to your subject, the shallower your depth of field will become. So the values posted below are specifically when you are standing 35 feet from your subject with this particular body and focal lengths. Yet if you slap on a 35mm lens, those values will change drastically simply because wider angle focal lengths have a great amount of depth of field compared to longer lenses. [ATTACH=full]373862[/ATTACH]  [ATTACH=full]373863[/ATTACH]</blockquote>

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