[photo-3d] Re: Slide bar stereo

[JNorman805@xxxxxxx]

Fred Sole writes:

<< my real question concerns the slide bar
 distances to be used. Initially, I just measured off the distance between
 the Realists lenses and used that as a reference. But in macro work I know
 this is no good. Can someone out there who has used a Bogen slide-bar give
 me some pointers on distance between left and right? >>

There are esoteric formulas out there that will give you the answer, but 
pragmatically, here's what has worked for me:  Start with the stereo rule of 
thumb -- i.e., that the distance between the two lens positions should be 
about 1/30 the distance from the camera lens to the nearest meaningful 
foregound element of the subject.  For example, if you are six inches away, 
slide your camera over .2 inch.  Then "bracket" the distance, meaning take 
three or four shots at different distances, on both sides of the 1/30 
distance.  When you get your film back, choose the pair that pleases you best.

Jim Norman

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