Thread: depth of field, f stops => feet/meters possible

1. depth of field, f stops => feet/meters possible

Hi,

Is it possible to know/calculate what will be in focus given the f stops

Like if I set f 3.5, what distance/depth will be in focus?
If its a zoom lens, how does it affect?

Thanks

2. Re: depth of field, f stops => feet/meters possible

here is the calculation webby:

http://www.dofmaster.com/dofjs.html

3. Re: depth of field, f stops => feet/meters possible

turtl3fly, Thanks.

Exactly what I was looking for.

4. Re: depth of field, f stops => feet/meters possible

Originally Posted by sglion

Like if I set f 3.5, what distance/depth will be in focus?

Thanks
DO NOT forget distance to subject in focus .... that is part of equation in determining DoF

5. Re: depth of field, f stops => feet/meters possible

Originally Posted by sglion
If its a zoom lens, how does it affect?
Then the calculated depth of field is only valid for one particular focal length. The moment you change the focal length (vulgo: zoom in / zoom out) the value for DOF changes.

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