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lightontheland's picture
Submitted By: lightontheland
Location: Crossville, TN
Joined: Jun 2 2005
Posts:
DOF at minimum focus distance
Posted: October 11, 2005 - 11:05am

OK, guys, here's a question that came up on another forum and got the usual avalanche of disparate responses: If you focus on an object exactly at the minimum focus distance for that lens and at an aperture of f/22, for instance, will anything inside the minimum focus distance still be in focus, or is that the brick wall? My feeling is that nothing inside minimum focus distance will be sharp, regardless of DOF prediction. I don't have any money down on this so if I'm wrong, I can handle it.....

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Monte's picture
Submitted By: Monte
Location: Iowa
Joined: Jun 10 2005
Posts:
#1
Re: DOF at minimum focus distance
Posted: October 11, 2005 - 11:33am

With my Fuji it seems that DOF does not matter at minimum focus. Everything inside that is not sharp. I have tried aperture settings from f8-F22. It makes no difference. Monte Johnson.

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etee's picture
Submitted By: etee
Location: Just outside of Houston,, TX
Joined: Mar 18 2005
Posts:
#2
Re: DOF at minimum focus distance
Posted: October 13, 2005 - 9:13am

I have also noticed this on the GA645Zi, and it has resulted in some interesting pictures (where I was shooting flowers, and some wound up being closer than minimum focus) -- it results in a very interesting 3D effect, and happens regardless of the aperture setting.

-EdT.

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Monte's picture
Submitted By: Monte
Location: Iowa
Joined: Jun 10 2005
Posts:
#3
Re: DOF at minimum focus distance
Posted: October 13, 2005 - 12:58pm

Ed,

Here attached is an example of some flowers shot at mimum focus with RVP50 F8. Monte Johnson

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