This is Figure 3-17 from Leslie Stroebel's View Camera Technique, 7th edition.
If I'm interpreting the figure and the caption correctly, Stroebel is saying that to avoid the need for recomposing and refocusing when using axis tilt or swing, lenses should rotate about a point directly in line with the back nodal point of the lens. Empirically this seems correct because that's how my symmetrical lenses behave on my axis tilt standard. In contrast, my telephoto and reverse-telephoto lenses need recomposition and refocusing on my axis tilt setup.
The reason for this post is that -- usually in the context of making panoramas with cameras where the image plane and object plane are fixed relative to each other -- it's said that the point around which a lens must rotate to maintain perspective is the entrance pupil. You can find this claim all over the Internet. Here's one example: http://hugin.sourceforge.net/docs/ma...lax_point.html
To those of you who are expert in the geometry of tilt and swing, I would like to know whether Stroebel is correct, and the other claim is incorrect. Or is it the case that Stroebel is correct for view cameras, where the object plane and image plane are not fixed relative to each other, and the panorama folks using cameras where they are fixed are also correct for their situation.
Thanks, Rob
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