It is not easy to catch my fault, I was running an engineering department
with more than 20 engineers, which act between R&D and production. I can't
know everything but I know how to write to avoid any wrong messages being
caught (ok, except English grammar) :-)
I didn't say long and short lens has different DOF at the same aperture and
mag. I have mentioned
"To maintain a soft OOF background and greater DOF one should use a very
long
focal length lens, say 300-500mm and stop down."
Here "long lens" for soft OOF background and "stop down" for DOF.
C.H.Ling
----- Original Message -----
From: "Moose" <olymoose@xxxxxxxxx>
> On 8/30/2011 7:55 PM, Chuck Norcutt wrote:
>> ... I had forgotten that maintaining the same image size
>> means that the DOF will be identical in both shots since the 300mm shot
>> needs to be taken from 6 times the distance.
>
>
> Whew, I'm glad you caught that. I didn't want to be the one who corrected
> D. Doff.
>
> Besides, I'd have had to check to see if my immediate sense was correct.
> Way too much work. :-)
>
> Based on CH's samples, I'd go the long FL route. There's nothing in the in
> between distance area to show what would
> happen there, so I don't know about that. The true DOF of the background
> (whatever that is), if the subject size were
> the same, may be the same, but larger and apparently softer is more
> attractive to me.
>
> Moose
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