[Leica] Tilt-Shift Miniatures

[rgacpa at yahoo.com (Bob Adler)]

Piers,
Thanks for?turning a light on in my head. I always wondered why it was so 
difficult to get NEAR objects above and below the plane of focus into 
focus?by 
stopping down.?Am I correct in assuming that above and below the DOF lines 
in 
the diagram (especially for close objects) can NEVER be put into focus?
Thanks,
Bob
?Bob Adler
Palo Alto, CA
http://www.rgaphoto.com 




________________________________
From: "piers at hemy.org" <piers.hemy at gmail.com>
To: Leica Users Group <lug at leica-users.org>
Sent: Wed, August 11, 2010 7:15:23 AM
Subject: Re: [Leica] Tilt-Shift Miniatures

No, Mark's assertion is a) an oversimplification or b) a misunderstanding of
the subtlety of the view camera. In any event, it is incorrect, in that as
you tilt the lens, the "depth of field" does not stay the same (being a
space whose front and rear planes are parallel to one another). As you tilt
the lens, the front and rear planes of the "depth of field" also tilt, but
in opposite directions to one another, so the space becomes wedge shaped.
Take a look at http://preview.tinyurl.com/233cq2a for an online calculator
for view camera DoF (even though the webpage is now, als, offline - that
link is via the Wayback machine).

On 11 August 2010 14:51, Tim Gray <tgray at 125px.com> wrote:

> On Aug 10, 2010 at 05:12 PM -0400, Mark Rabiner wrote:
>
>> The DOF depth of field stays the same but the plane it lays on changes.
>> You have the plane of field skim over the tops of things.
>>
>
> Correct.? I should have been more precise in my wording.? However, it
> mimics a shallow depth of field - at least to the regular viewer with no
> knowledge of tilt-shift.
>
> I still stand by my comment.? This effect relies on creating the impression
> of a *photograph* of miniatures, and not of the impression of miniatures
> themselves.
>
>
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