minicoop1985
Been spending a lot of time on here!
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- Sep 3, 2013
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- Appleton, WI
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I took this shot today as a bit of a lesson for anyone interested. This is called depth of field, the field being the in focus area. The shallower the depth of field, the smaller the area in focus is. What controls the size of that field is your aperture. The lower the number for your aperture, the larger the diameter, so basically the opening of a 1.4 lens at 1.4 is much wider than one shot at 5.6. Now here's the fun part. MATH! The longer MM a lens is, for a given distance at same aperture, the DOF for the longer lens will be thinner. Also, sensor size plays into this as well-the larger the sensor, the longer the lenses needed to effectively cover the sensor area, so the larger the sensor, effectively, the thinner the DOF. This was shot on a Hasselblad H3D 39 medium format (aka a sensor 2X+ the size of the one in a full frame Canon or Nikon) with a 150mm f3.2 lens, shot wide open. No, I didn't blur it in post.
Fun with DOF! by Michael Long, on Flickr
Fun with DOF! by Michael Long, on Flickr