Depth of field


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bonfire

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Feb 20, 2003
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#1
At any given equivalent aperture setting do digital ZLR have a greater depth of field than a Digital SLR?
 

bonfire

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#3
moos blues said:
DOF shld be dependant on the lens, Since a digital sensor is a croped version of a flim neg, the DOF shld be the same. =)

cheers!
Just plugging in some numbers seem to suggest otherwise at this site.

http://dfleming.ameranet.com/dofjs.html

Lets compare 35mm camera
At 75mm at f/2.8 with the lens focused at 20 feet has a DOF of 18.3-22 ft

A D70 which is a 1.5x camera so I will need to use a 50mm lens for the equivalent image size again focused at 20ft and set at f/2.8 has a DOF of 17.6-23.2 ft. Notice for exactly the same image size, the DOF has gone up due to using a different format which results in needing a smaller lens for the same photo. Is thiis the real world application of a smaller sensor and its resultant larger DOF for the same subject size?
 

loupgarou

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Sep 9, 2003
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#4
depth of field is dependent on actual focal length (&distance to subject), not effective focal length
 

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