Rethinking 4/3 Depth Of Field

Started Apr 11, 2013 | Discussions thread
Just Having Fun
Senior MemberPosts: 3,869
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Re: Distance
In reply to al_in_philly, Apr 12, 2013

al_in_philly wrote:

Just Having Fun wrote:

DoF is mostly determined by distance.  Distance to subject vs. distance to background.

Want more DoF?  move subject closer and/or move away from background.  This is true for any size sensor.

You're absolutely correct that DOF can be altered by changing the distance between the focal plane and the subject.  But it is also determined by the aperture, focal length, sensor size, as well as distance to the subject, with each variable interacting with the others.

Exactly why I didn't claim it was only due to distance.  Most for the time though you have more control over distance.  You can change aperture, but it is limited by the lens.  You can change focal length if your lens lets you.  You can crop to change sensor size smaller and combine images to make the sensor act larger (ie MS ICE)...but again these are all usually very limited options.   Usually (not always) you have more freedom with distance.

Also, as I pointed out before, you can always shrink DoF, but with one image you can't add DoF back.  IMHO this means more is better (more options).

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