Re: [photo-3d] Slide Bar Experiments

["Allan Griffin" <agriffin@xxxxxxxxxx>]

To Fred Sole,

Hello Fred,

You ask if twin SLRs are OK for regular stereo.
Generally, they are a special purpose tool, only intended for use on work
where a standard stereo camera will not fill the bill as well.
When you say that you are told that the separation is too wide, of course
thats true with regular focal length lenses.  To completely offset
miniaturisation in subjects including people, you really have to go to 135mm
lenses.  Do you not have some kind of stereo camera as yet?
Please put your name in the "From" field.  I had to wait till I got to the
end to know if you were in fact a real person!

Allan Griffin


----- Original Message -----
From: mail <TCNET058@xxxxxxxxxxxx>
To: <photo-3d@xxxxxxxxxxx>
Sent: Monday, April 17, 2000 10:27 AM
Subject: [photo-3d] Slide Bar Experiments


>    Today I tried out the Bogen Slide Bar that DrT has waxed euphoric
> about on his web site. After shooting 16 of 18 possible pairs, I
> realized I should have marked the slide bar about halfway between the
> 2 and 3/4 inches I had set aside as the distance for the 2 positions. I
> made the mistake of using the right side for viewing. Oh well... live
> and learn. Add more moving parts, make more mistakes. There is a bridge
> replacement project going on in my area and I thought this would make a
> good large stationary object to test the sliding bar technique. Of course
> I had to time it so that the trucks would move out of the picture before
> snapping of a pair. I also have  to wonder about small movements of
> other things like dust and so forth. Seems to me that the sliding bar
> routine would best be served with controlled subjects in a controlled
> environment.
>    Anyone on here used larger SLRs to twin? I am told that this is not
> a good approach as the cameras are too far apart for proper stereo.
>
> -Fred Sole
>
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