[LargeFormat] Macro photography and movements

[Mike Finley]

On Sat, 31 Jan 2004 15:11:04 -0800, "Paul Butzi" <photo@butzi.net>
wrote:

>> Agreed, but I was talking about the film to subject distance, not lens
>> to subject. I'll try to put it another way:
>>=20
>> If you start with film and lens parallel, at 2xf, then the plane of
>> focus is 4xf from the film, or 2xf from the lens.
>>=20
>> Where is the plane of focus if you then tilt the lens (using an axis
>> tilt)? Is it still a plane, with one part closer to the minimum
>> focussing distance for a conventional camera (ie film to subject less
>> than 4xf), or is it curved, with the focus at 4xf on axis, and further
>> away than 4xf both above and below?
>
>It's a plane.  Scheimpflug's rule works regardless of magnification.  =
The
>plane that is perpendicular to the lens axis, the film plane, and the =
plane
>of focus will always either not intersect at all (all three planes are
>parallel) or else they will intersect in a line.
>
>
>-Paul
>
Thanks, Paul. must have been operator error, and I'll try again. I
(obviously!) don't understand optics once you get away from the easy
cases ...



Mike Finley, http://www.efikim.co.uk