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Focus Pulling on Arriflex SR2


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#1 Eric F Adams

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Posted 24 December 2011 - 10:18 PM

On a SR2 we are fooling with with have a Cooke 10.4-52mm. I notice forinstance, If my subject is like 12 feet away, and then he approaches to about 6 feet away and we have our focus set for 10 feet...we still received a good picture back from the lab. My question is: Generally, how much "play" (in feet) do you have when the subject is moving closer/further away and the focus is set at a fixed mark? Like in the example above, I was surprised to see the subjects were in focus when we did not pull/push the focus at two separate points.
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#2 Isaac Hughes Green

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Posted 26 December 2011 - 11:48 PM

The lens doesn't dictate this, it's the lens aperture, camera aperture, focal length, and distance to subject. The glass used in your lens and orientation should only effect the bokeh so you may just be noticing cleaner falloff.

http://www.dofmaster.com/dofjs.html

Edited by Isaac Hughes Green, 26 December 2011 - 11:50 PM.

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#3 Eric F Adams

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Posted 27 December 2011 - 08:19 PM

The lens doesn't dictate this, it's the lens aperture, camera aperture, focal length, and distance to subject. The glass used in your lens and orientation should only effect the bokeh so you may just be noticing cleaner falloff.

http://www.dofmaster.com/dofjs.html



Thanks Isaac, that link is very helpful.
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