P3D Re: The Stereo Glossary

[Steve Berezin <sbere@xxxxxxxxxxxxx>]

George Themelis wrote:
> 
> --- Steve Berezin <sbere@xxxxxxxxxxxxx> wrote:
> 
> > Although some of the definitions are flawed (they are limited
> > by being one-person's opinion)
> 
> Good try Steve.  Sometimes it is more than a matter of opinion.
> That's why it helps to ask people's input on this and I am glad
> you are doing it. Here are a few suggestions:
> 
> "2 x 2 Format (also known as twinned format, 50mm x 50mm)
> This stereo photography format uses either one 35mm camera
> (shifting with either the cha cha method or a slide bar) a twin
> camera (two monoscopic cameras paired) or a full frame stereo
> camera such as the RBT, to produce two separate 'conventional'
> slides."
> 
> You can mount Realist slides in 2x2 mounts... Even VM chips if
> you can find the right mount... So, 2x2 is a method of
> mounting/viewing and has little to do with what camera system
> took the pictures.
> 
> "Interocular adjustment (also known as variable interocular)
> A provision in some stereo viewers which allows for adjustment
> of the distance between the lenses of the viewer to correspond
> with the distance between a viewers eyes."
> 
> Common misconception.  The adjustment is more useful to match
> the image's infinity separation as our discussion of VM viewers
> reveals.
> 
> "Macro Stereo Photography
> In a strict sense macro means that the image on the film is
> about the same size or larger than the true size of the image.
> In stereo it generally means that the stereo base (distance
> between the two taking lenses) is less than the average distance
> between a persons eyes (~63mm).  "
> 
> This last sentence is the definition of hypostereo.  Macro
> stereo photography continues to be related to the magnification
> or focusing distance.  The fact that you have to reduce the
> stereo base comes from somewhere else...
> 
> George
> 
> =====
> George Themelis, DrT-3d@xxxxxxx
> http://home.att.net/~drt-3d/

Thanks, even while writing these they did not seem quite right.  I'll
try to incorporate the suggestions into the glossary.  Any other
suggestions or definitions anyone wants to add please forward them.  
-- 
mailto:sbere@xxxxxxxxxxxxx
http://www.berezin.com/3d
Steve Berezin
Berezin Stereo Photography Products
21686 Abedul
Mission Viejo, CA 92691
USA