rg
[EMAIL PROTECTED] wrote:
----- Original Message ----- From: "John Munro"
Subject: RE: Large Format vs. Digital/Stitching
The section which states, "... the shooting technique results in a "plane of focus" of a sphere instead of a plane."" baffles me - how
can
there be a spherical plane of focus of a plane? I assume the plane being talked about is a two-dimensional film plane, am I mistaken?
When you rotate the camera and lens, the plane of focus follows that curve, hence becoming spherical. Semi spherical, I suppose, since you will only have so much of the sphere in the picture (unless you do 360° panoramics). Technically speaking, the plane of focus will be a mess, since most lenses aren't flat field anyway, so what you will have is a semi spherical plane of focus, broken down into a number of curved field focus planes. By stopping down to normal shooting apertures though, this becomes irrelevant, since any focus wonks will fall within depth of field. Add to that, there is no reason why each individual image cannot be refocussed (they should stay in scale, close enough for landscapes, anyway), thereby negating any focus problems that may, theroetically, crop up.
Photograph William Robby is about taking pictures, and doing a little experimentation to see what works. I've had more than a few discussions about things that I know damn well will work, because I have done it, with theoretical photographers who won't take a picture because it is technically unfeasable.
William Robb
