Petri Computor 35 - depth of field?

Lol999

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Hi all, just returned from a car boot sale with a Petri Computor 35 in gooid nick. The rangefinder appears to have become decoupled but thats not an issue as I plan to use it in pre focus mode based upon approximate distance. it has a 40mm lens. Now my question is: what sort of depth of field am I likely to get at say f5.6 when focussed at 7 feet? On my 28mm lens I set at about 7 feet and everything is in focus between about 5 feet and 15. is there any resource to give me a clue?

Cheers, Lol
 

ThomThomsk

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Lol999 said:
Hi all, just returned from a car boot sale with a Petri Computor 35 in gooid nick. The rangefinder appears to have become decoupled but thats not an issue as I plan to use it in pre focus mode based upon approximate distance. it has a 40mm lens. Now my question is: what sort of depth of field am I likely to get at say f5.6 when focussed at 7 feet? On my 28mm lens I set at about 7 feet and everything is in focus between about 5 feet and 15. is there any resource to give me a clue?

Cheers, Lol
3.27 feet, 1.27 feet in front and 2 feet behind your subject. Well, that's what it said here:

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

Edit: I just found a handy little table you can configure for your lens and film size, and then print out:

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

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