Re: Converging lenses (was: Window reversal); D|s-TortiO|\|s

[P3D Michael Kersenbrock <michaelk@xxxxxxxxxxxxxxxxxx>]

> While talking about keystoning and resulting distortions, the assumption
> is being made (but not stated) that a parallel viewing system is used.
> This means either a viewer with parallel lenses or projection with 
> parallel projecting lenses.  Of course, this is usually the case, BUT it 
> does not have to be so.  

My reading of the thread was that introduction of keystoning was claimed
to be one of the ABSOLUTE no-no's.  That is, it was under ALL conditions a 
fault and unacceptable.  I've come up with examples that I think refute that
notion.  Even one that's not using artistic reasoning.

In terms of being a guideline (probably a strong-ish guideline) that
shouldn't be violated w/o reason, then I'm all for it.  Generally speaking,
keystoning isn't something desirable to inject into our image taking.

But *sometimes* it can be "a good thing" (pardons to a certain un-named woman).

Mike K.


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