Chuck Norcutt wrote:
>Jeff Keller wrote:
>
>
>
>>I was thinking to use the same objects placing them at the appropriate
>>distance to give the same image size for each lens ...
>>
>>
>
>Makes sense to me and has the advantage of maintaining the same DOF.
>
>For example, using a 50mm lens at 18" would require using a 100mm lens
>at 36" for the same image size. If both lenses are set at f/8 the DOF
>will be the same on both lenses at approximately 1-1/2 inches.
>
>
That's the approach C.H. used i his tests.
The one thing that hasn't been mentioned is the distance from subject to
background. That can make a huge difference in bokeh with the same
aperture, focal length and subject distance.
Moose
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