Re: [tech-3d] 4x5" viewer & hypers

[Peter Homer <P.J.Homer@xxxxxxxxxxxxx>]

>Brewster stereoscopes employed turning mirrors after the eyepieces.  If
>the images are poster sized one can omit lenses entirely.  The mirror in
>front of the right eye looks at the poster on the right and the left the
>left.  The "poster" could be a large contact print or even an enlarged
>medium format print.  There was a time when poster sized photos were
>produced in poster sized cameras...for example, in railroad
>advertising.  Possible, but expensive, and with a small museum market at
>best.  However, self indulgence in technology can be its own reward.

Actualy this sounds more like a description of the original Wheatstone device,Brewster usualy gets the credit for the first lenticular or lens stereoscope. Although Wheatstone was ahead of him there as well but Brewster popularised the stereoscope more.  P.J.homer 



-------------------------- eGroups Sponsor -------------------------~-~>
eLerts
It's Easy. It's Fun. Best of All, it's Free!
http://click.egroups.com/1/9699/1/_/520353/_/976527612/
---------------------------------------------------------------------_->