A Question on DOF

[azone]

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]

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.....