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Re: [OM] More on DOF and focal length (by Ctein)

Subject: Re: [OM] More on DOF and focal length (by Ctein)
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Mon, 29 Jun 2009 21:58:02 -0400
A little bit.  The DoF formula wants the distance to the subject.  But 
subject distance is measured from the image plane.  If you move that 
forward by a few millimeters you'll get a different DoF.  :-)  :-)

Chuck Norcutt

C.H.Ling wrote:
> ----- Original Message ----- 
> From: "Tom Fenwick"
> 
>> 2009/6/29 C.H.Ling
>>> I'd love that's true then I don't need to worry the DOF of my FZ-18's
>>> 1/2.5"
>>> sensor and the 500mm equivalent lens as the DOF should be the same as my 
>>> 5D
>>> II with a true 500mm lens.
>>>
>> I wish I could explain the whole discussion, but this bit above is easy -
>> you've mucked things up on the FZ-18 by moving the sensor/film plane 
>> towards
>> the lens!
>>
>> Tom
>>
> 
> Really? The film plane to lens distance will affect the DOF? What about the 
> DOF of Leica RF 35mm to OM 35mm system?
> 
> C.H.Ling 
> 
-- 
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