DOF at each F stop setting?

[Hair Bear]

Is there any way, or is there a standard setting, where I can find out exactly what sort of DOF I have at each F stop setting on my Nilon 30-70 Lens?

 

[jwkwd]

If your camera had a DOF preview, that would show you in your viewfinder. If it does not, this calculator might help: http://www.dofmaster.com/dofjs.html

 

[Hair Bear]

Great site thanks for the link

So that tells me the larger zoom will result in shallower DOF.

And also at 50mm there is only samll differences in DOF.

 

[fightheheathens]

my camera has one of these on it.

http://content.answers.com/main/content/wp/en-commons/thumb/e/ea/240px-Lens_aperture_side.jpg

which shows you approx depth of field.

ie, on this picture, the lens is at f/11. that means that on the focusing ring, you can see 1 and 2 are between the two 11's meaning between 1 meter and 2 will be in focus. I dont know if that comes on the modern auto focus lens anymore, but its on all of my manual ones....

 

[Hair Bear]

Mine has a distance for foucs point but doesn't tell you how much focus

So you can tell by looking at the focus ring the distance to the point of focus but not how many feet either side of that point will be in foucs.

 

[Big Mike]

If you have a chart for your camera/lens, it should tell you the DOF. From your point of focus, the DOF will extend 1/3 back toward you and 2\3 past the point of focus.