A Question on DOF


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azone

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Jan 20, 2002
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#1
Given that for both setups, same camera and aperture values are used. Same magnification (1:1) is achieved. Will the DOF be the same?

Setup 1:
Lens: 180mm macro lens
Working distance: 25cm
Magnification: 1:1

Setup 2:
Lens: 90mm macro lens
Working distance: 9cm
Magnification: 1:1

Understand that perspective (angle of view) wise there is a difference, due to the different focal length of each lens. But does it affect the DOF?


Anyone can give an answer to the above question? ;)
 

Kira

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Jul 2, 2003
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#2
no the DOF will not be the same cos one of the factor for DOF is the focus length..... So if I'm not wrong, your 180mm will give you a shallower DOF at the same f stop and focus distance. In addition, your subject to background distance will also determind your DOF.....

Do a search on DOF on any search engine and you might be able to find out more....

Hope this helps.....
 

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