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Old Dec 6, 2006, 1:28 PM   #1
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Is there a chart that will show the differences in lens's distance to background Bokeh effect? For instance on my 50mm at 1.4 apeture I get great background blur at 3 ft behind subject. How do I calculate the distance to background needed for the same effect on say 100mm at 5.4? Is there a chart for that?

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Old Dec 6, 2006, 8:08 PM   #2
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Well, bokeh typically refers to the quality of the blur. That's tough to quantifiy. But, you can qualify what the depth-of-field is that is how deep the focus plane is. Two different lenses can have the exact same DOF, but lens A could have more pleasing bokeh.

Here's a link to calculate DOF using a given camera, aperture and focal length:


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Old Dec 7, 2006, 2:12 PM   #3
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anyone have the link to thevisual dof calculator that shows pictures of salt&pepper shakers?
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