Busting the FF vs Crop DoF Bokeh Myth

Started Jul 27, 2009 | Discussions thread
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therickman Senior Member • Posts: 1,305
Busting the FF vs Crop DoF Bokeh Myth
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There's been so much discussion, argument, and name-calling because of the disagreements (misunderstandings) over the depth-of-field and bokeh of full frame versus 1.6x crop cameras, I decided to finally do a controlled test with my 50D and 5D.

My conclusion:

At the same distance from subject, using the same exact lens, there is absolutely no difference in DoF and bokeh between images produced by a full frame and crop camera.

Test setup consists of tripod with camera exactly 5 feet from the Ansel Adams book with center focus on the "L". John Freeman's "Photography" book is exactly 1 foot behind, "Lighthouses" book 2 feet behind. Images are JPG straight out of camera with no PP applied. Sharpening in-camera at 7. Contrast in-camera at +1.

Here is the setup shot at 5 feet with the 5D with 50mm f/1.4 lens

Here is the setup shot with the 50D with 50mm f/1.4 lens

And here are my findings

Here is the setup shot with the 5D with 85mm f/1.8 lens

Here is the setup shot with the 50D with 85mm f/1.8 lens

And here are my findings

Here's a link to my full-size test images:
http://www.flickr.com/photos/picsurephoto/sets/72157621866502388/

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