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I stand corrected! Now that I think of it, I've gotten an image similar to that too, but the focus was so far out that it was just pretty colours (shot at night, street lights, etc).
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Hi Steve&Robert,
thanks voor 'zooming in' on my relatively OT statement there. Helps me a lot! Pieter (ps - and I learned a new word: bokeh ;) |
I too would love to be able to do DOF effects more naturally, but it costs so dang much. In a short movie I made (before buying my HV20) I did the green screen trick. I think it looks alright.
Here's a link, not to my movie but a short demo of some of the effects in my movie. You'll see one is a DOF effect using green screen. I don't think it looks half bad. http://youtube.com/watch?v=AXec4XjmtHE |
For anyone who gets hung up on depth of field, I urge you to see Orson Welles's Touch of Evil.
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Zooming in does not produce shallower DOF if the subject takes up the same portion of the screen.
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Actually yes, technically this is indeed true. Zooming in will in fact produce a shallower depth of field. However this technique for decreasing depth of field is not all that useful because the subject size obviously changes as focal length changes. For a full explanation, see our definitive article "The Ultimate Depth-of-Field Skinny" by Jeff Donald, located at http://www.dvinfo.net/articles/optics/dofskinny.php -- hope this helps,
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You are both correct.
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It's important to note the difference, because if a shot is framed the same way at wide angle and telephoto, the telephoto shot will yeild more diffuse background blur due to magnification, even though the DoF is the same. |
DOF Test
I did a quick test on DOF for the HV 20. You can view it here:
http://www.vimeo.com/393169 Make sure to select Full Screen to see detail. Hope it helps. Brad |
Hey, Brad, thanks for the DOF test on the HV20. The image is gorgeous.
I'm curious -- are you the same Brad Mirman who wrote Resurrection? One of the creepiest serial killer movies of all time. rgb |
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