From your same source: "..., the diffraction-limited depth of field is
the same for all sensor sizes. In other words, if one were to use the
smallest aperture before diffraction became significant, all sensor
sizes would produce the same depth of field-- even though the
diffraction limited aperture will be different."
I stick by my calculations which used diffraction limited apertures for
each sensor. f/6.3 for the 7D and f/10 for the 5D Mk II. I also stick
by my comment that the lens requirements to reach near to diffraction
limited performance will be easier for the 5D Mk II.
Chuck Norcutt
Jeff Keller wrote:
> See
> http://www.cambridgeincolour.com/tutorials/digital-camera-sensor-size.htm
> "Depth of Field Requirements" halfway down.
>
> For macro needing DOF, small format wins.
>
> Jeff
>
> -----Original Message-----
> From: Chuck Norcutt [mailto:chucknorcutt@xxxxxxxxxxxxxxxx]
> Sent: Thursday, August 05, 2010 5:15 PM
> To: Olympus Camera Discussion
> Subject: Re: [OM] [OT] - Advice wanted about 5D2
>
> There might be perfectly fine reasons to get a 7D vs 5D Mk II but depth
> of field for landscape shots will not be one of them. Although shorter
> focal lengths lead to greater depth of field, the larger magnification
> required from the smaller sensor leads to lesser depth of field.
> Diffraction also places limits and tends to be the equalizer.
>
> **snip
>
> Chuck Norcutt
>
>
> Moose wrote:
>
>> As I am usually working for the opposite of Dawid's shallow plane of
>> focus, I've be wondering if a 7D might not be a better step for me
>> than 5DII. The 15-85/3.5-5.6 (24-136 eq.) appears to be a very fine
>> lens for it.
>>
>> Multi Mode Moose
--
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