DOF 14-35mm in relation tot 12-60mm

Started Apr 22, 2013 | Discussions thread
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archeogeolab Contributing Member • Posts: 536
DOF 14-35mm in relation tot 12-60mm

Shooting from exact the same place with the same FOV (for instance 15mm), the same APERTURE, while using MF, the difference between these two zooms is apparant.
When MF-focussing on a distant object (400m away) the objects on the foreground are definitely sharper on the 12-60mm zoom than on the 14-35mm zoom (on the 14-35mm zoom the foreground is far more out of focus, showing bokeh).

On the other hand, when focussing on the foreground (at 2 meter distance), the 12-60mm zoom definitely shows more out of focus bokeh in the distance than the 14-35mm zoom.

Does somebody know the reason for this behaviour? I expected the same aperture values should give the same depth of field characteristics.

Thanks in advance, Erik

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