Depth of field

[Tim Gray]

[font color=\'#000000\']Figure out the "cropping factor" vis a vis 35mm  ie 1.3 1.6x etc.  Take the DOF formula and divide the COC factor for a 35mm frame by the cropping factor.  Some DOF calculators just let you plug in the camera and it automatically makes the COC adjustment.  Deciding what Circle of Confusion makes sense for your purposes is a whole different question - there are other recent threads on that.[/font]

[franxon]

[font color=\'#000000\']Check it out:
http://www.nikonians.org/html/resources/gu...yperfocal2.html

BP[/font]

[font color=\'#000000\']just wondering why there are canonians and nikonians not canonese and nikonese.  [/font]

[Jhenning]

[font color=\'#000000\']I have read an article on the depth of field limitations of digital cameras. I am considering a Kodak SX7590. As far as I could determine it uses a 2/3 “ imaging chip. How can one relate this back to a 35mm camera to compare depth of field?
I would appreciate any comments.[/font]

[Brentbat]

[font color=\'#000000\']Actually I was hunting down a hyperfocal chart for my digital camera and came across this useful calculator for exploring depth of field and hyperfocal distances.

It doesn't list your specific model of camera in it's list, but there are other Kodak and digital cameras that would be comparible.

Check it out:
http://www.nikonians.org/html/resources/gu...yperfocal2.html

BP[/font]

[BJL]

[font color=\'#000000\']This has been debated repeatedly, so I hope I do not open anothe can of worms by saying this, but ...

If you take photos the same angular field of view in different formats, and make prints of the same size without much cropping, you have to adjust the focal length in proportion to the format to kepp that same FOV, and to get the same DOF you must adjust the aperture ratio by this same factor.

For example, comparing 2/3" format to 35m film format, the size ratio is about four, and thus 10mm, f/2.8 in 2/3" format matches roughly 40mm f/11 in 35mm format: roughly normal field of view, lots of DOF.

The fastest aperture in current 2/3" format cameras is f/2, which matches f/8 in 35mm for DOF under these terms of comparison.[/font]