BTW, it still does not explain why the Leica RF 35mm system has the same DOF
as other 35mm SLR system or it is not?
C.H.Ling
----- Original Message -----
From: "C.H.Ling"
> For the same magnification, a 100mm equivalent lens should gives the same
> "working distance" as a 100mm lens in 35mm system (except for close up may
> be), it means the distance to the subject will be the same.
>
> C.H.Ling
>
> ----- Original Message -----
> From: "Chuck Norcutt"
>
>>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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