P3D Re: Slide Bars vs Twin Camera Bars

[Linda Nygren <lnygren@xxxxxxx>]

Lawrence A. Haines wrote:
> 
> I am just begining to use two cameras for stereo work and am looking for
> a suitable bar to mount the cameras on.  My purpose is to make longer
> distance stereo pictures which have stereo effect not normally visable
> with twin lens cameras.  I have found a bar made, by a man named Tim
> Chervenak of Jasper Engineering in California, specifically for such
> work.  He is asking $169 for it and he tells me the cameras can be
> located close together, or as far as about 12 inches apart.  Susan
> Pinsky says it is of very good quality.  I have noticed a track sold by
> Edmunds Scientific which is 24 inches long and can mount two platforms
> which are 2..25 inches wide.  I would have to do some minor modification
> of those parts to make them work but they would be quite accurate. That
> assembly would permit separations of  about 19 inches and would cost
> $275.  The only experience I have had so far is rocking back and forth
> to achieve two pictures with a single camera - not very accurate or
> satisfactory.  I have two questions which I hope someone can answer.  Is
> there anything else available?   If  I am going to buy a slide bar I
> would like to get one that will have maximum usefullness.  How much
> separation do I need for most pictures?  I do realize that there will be
> some pictures requiring very large separations but those will naturally
> be few.
> 
> Larry Haines
> <lhaines@xxxxxxxxxxxxxx>
> tel  801-489-6600 or 360-376-4704

Larry, are you looking for a *slide bar* for one camera, or a *twin
camera bar* for two cameras mounted at varying distances apart? Or do
you need both? I believe the basic Jasper setup is for one camera that
can be moved, or if you want to use a second camera you have to buy an
additional attachment. Reel 3D sells a Twin Camera bar (for about $54)
that is 16" wide with possible separation between the cameras being up
to about 15". It is apparently not suitable for use as a slide bar for a
single camera. Also, Widescreen Centre (in the UK) has a bar that can be
used for either one or two camera work. The Reel 3D option is the most
reasonably priced if you plan to be doing 2 camera work exclusively. I
have recently ordered one of these. If I decide to do closeup work in
the future (with one camera), I plan to try one of those home-made 
plywood-based platform setups that have been discussed on the list 
previously. -Linda


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