Depth of Field - A matter of aperture or distance to subject.

Started Aug 17, 2014 | Questions thread
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Depth of Field - A matter of aperture or distance to subject.
Aug 17, 2014

The below image was shot using two speedlights, a Nikon D7100, and a Nikon DX 35mm f/1.8. The settings were, ISO: 640, 35mm, f/1.8, 1/100. Camera is about 10 ft from subject. Back wall is about 15 ft behind subject.
Question: I was expecting a much shallower depth of field than this at 1.8. I was hoping the back wall would be far blurrier (nice bokeh, random shapes). Why is the back wall only slightly out of focus at 1.8? Is this more a matter of focal length and distance to subject that causes this? I know at very close range with this lens, my DOF is miniscule. If so, how would I get the tight DOF I want if I can't back up any more to use a longer lens?

Why is back wall not more out of focus?

This question has not been answered yet.
Nikon D7100
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