No longer necessary. CH has answered the question. Using his 5D Mk II
at 10X live view he cannot differentiate focus between 5 and 6 meters.
So, I continue to maintain that your original test of the OM 24/2.8 and
DZ zoom at 24/3.2 does not conclusively show that the DZ zoom somehow
mysteriously displays more than the theoretically expected DoF. If you
has focused the OM 24 at 5 meters and the DZ zoom at 6 meters the DoF of
the zoom at f/3.2 would be increased by 5 meters on the long side.
Chuck Norcutt
Ken Norton wrote:
> Nope. Although I can--especially with usaf targets, It is difficult
> enough that it isn't repeatable with other gear. Gear like the Canon
> 5D with a less than useful viewfinder. ;)
>
> Therefore, let us redefine the test for DoF. I'm not going to bother
> proving the focus test as I'm personally quite satisfied in my
> abilities there. Any further effort on that 5 and 6 meter testing is a
> waste of my time.
>
> What I am interested in, however, is doing a DoF test that is repeable
> by anybody here on this list with there own equipment. Since 5-6
> meters is not realistic for some cameras, let's choose a distance
> which is focusable. Probably 3 meters, but I'll let Chuck define the
> distance as he will be the one building allthe DoF and diffraction
> tables.
>
> I am not going to start until this test is defined.
>
> AG
>
> On Sunday, August 15, 2010, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
> wrote:
>> Recall that your original comparison photos of the OM 24 and DZ
>> (whatever) zoom were at 5 meters. I maintained that you wouldn't be
>> able to differentiate between 5 and 6 meters. So, just as before, only
>> 5 and 6 meters required.
>>
>> Fire away.
>>
>> Chuck Norcutt
>>
>>
>>
>
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