P3D Re: Cha-cha-cha

[Mark Damish <mdamish@xxxxxxx>]

I get many good results with the cha-cha technique, but I use a mechanical
aid.  I purchased a focusing screen for my SLR, which has horizontal
and vertical lines etched into the screen.  Using a horizontal reference,
such as a sky line, I align my subject, or preferably a background object,
at a certain height along one of the vertical lines, and shoot the left
shot.  I shift my weight, or even move hundreds of yards, re-align the
horizontal reference, and re-align the object along the vertical line,
sometimes with a horizontal offset to avoid key-stoning, and shoot the
right image.  The same technique can be used with one or two vertical
references as well.  ie: a mountain peak, and a rock below the peak.

Unless I make an error, all of the images are viewable, and
most are projectable with little or no correction.  I am not too good at
correcting rotational errors, but it can be learned, and the error can
be easily seen by viewing a stereo projection, without using polarizing
glasses.  

...Mark

> > I do not mean to be discouraging but this method of creating stereo pairs is
> > [...]

> Unfortunately, I tend to agree.  My wife's success at trying that
> [...]




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End of PHOTO-3D Digest 2730
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