[Leica] Is the DOF using a digital sensor any different than thatof film?

[imagist3 at mac.com (George Lottermoser)]

Henning,

No. Never "used" a Sinar. Played with them in other's studios.

My experience with format changes goes more like this:
8x10 back on Deardorf (or at one time Calumet).
Focus on scene.
Feels too wide.
Put 5x7 back on Camera.
Feels right.
No change in focus, distance from subject or DOF.
Just a smaller section from the image circle.

I also realize that
if you want to achieve
the same composition or field of view,
with the same lens on different formats,
things change a great deal:
distance from subject,
distance between lens and plane of focus,
then, of course, effective DOF,
as well as the apparent perspective.

Seems like two different ways to think about DOF.
Both correct and useful in their own ways.

Regards,
George Lottermoser
george@imagist.com
http://www.imagist.com
http://www.imagist.com/blog
http://www.linkedin.com/in/imagist

On Feb 7, 2009, at 2:29 AM, Henning Wulff wrote:

> George, you've used a Sinar, haven't you? On the depth of field  
> scale, attached to the rear fine focus adjustment, the DoF scales  
> are there for 4x5 or 5x7 or 8x10, or there is a combination scale.  
> They're different for each format.