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Could anybody tell me (plain english preffered) on DSLRs with a crop factor does the depth of field become greater with the magnification effect, stay the same, or get smaller.
Just curious and could not find an answer to this.
Thanks.
Technically, it stays the same. DOF is relative to the focal length & aperture used (and size of final image).
That must have been about the shortest and least contentious thread I have ever seen about DOF and crops!!
:0)
Ian
Give it time Ian!
I know a college lecturer who is working to prove the DOF changes with the size of the sensor as well as the lens(although I cannot see how it would myself!)
Joe B
If you have a sensor of zero size then nothing will be in focus and therefore the dof must be zero. In which case there must be a relationship between sensor size and dof!
That should get it going! lol
Ian
DOF has one variable that hasn't been mentioned and that is the circle of confusion - go google if you want a technical description! The COC is different for sensors to film, so basically dof may change between film and digital. This doesn't have anything to do with the crop factor and could be considered to de insignificant.
Ian - don't think you can apply calculus to sensor size . . .
I'll apply calculus to anything to get a good debate going. 
Quote: one variable that hasn't been mentioned and that is the circle of confusion
There is a good reason for not mentioning it......
Quote: Could anybody tell me (plain english preffered)
Now, everyone is jumping in on this thread. It was so peaceful before Ian butted in >
Right - I'm off home now - better unsubscribe to avoid my mail server crashing . . .
Why doesnt that surprise me Joe.
Think I'll pay him a visit next week and get him out in the fresh air!
Sorry. :0(
Ian, ignore everything after your second post. :0)
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