Depth of Field Something you may not know

If the aperture and the image size remain the same, all focal length lenses provide the same depth of field. This is significant!

If you photograph a subject at life-size on a Nikon 60 mm macro lens, then move back and photograph it with a Nikon 200 mm macro lens at the same magnification ratio using the same f-stop, the depth of field will remain the same. The angle of view will lookdifferent as will the characteristics of the out of focus blur because of the perspective of each lens but, because the image size and f-stop are the same, the depth of field is identical.

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