I thought the rule of thumb is that larger formats have slightly less depth
of field given the same final print size. IOW the loss of DOF for longer
lenses was slightly faster than the additional magnification. Isn't this the
heart of the problem getting limited DOF with digital?
Perspective compression is a function of viewing distance being much
different from camera distance. Doesn't really depend upon format at all.
The relative sizes of objects in an image of course only depends upon camera
distance.
Also the 180mm doesn't have the same FOV on 6x9 as a 50 has on 24x36 ... a
120mm would be closer.
-jeff
----- Original Message -----
From: "Skip Williams" <om2@xxxxxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Thursday, December 02, 2004 12:09 PM
Subject: [OM] Re: Great E-1 150/2.0 pix on dpreview.com
>
> The answer is NO.
>
> Photo 1: 180mm lens, 6x9 film.
> Photo 2: 50mm lens 35mm film
> Photo 3: 25mm lens 4/3 sensor
>
> All three will have about the same FOV from the same camera position.
>
> All three will show the same perspective compression.
>
> At the same apertures, the shorter lenses will show much more depth of
field.
>
> Skip
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