P3D Re: Bolex

[Oliver Dean <3d-image@xxxxxxxxxxxxxx>]

Marvin Jones wrote
> Message text written by INTERNET:photo-3d@xxxxxxxxxxxxxxxxx
> >Norman is right about the Bolex projection lens and its polarizers.  Dr.
> John Hart, honcho of the  SCSC Movie/Video division, helped me replace
> mine several years ago.  It is not too difficult to do once you obtain
> optically flat, heat resistant, polarizing material that you can cut to
> a small size.<
> 
> The projection lens is the one main problem for people acquiring this
> system today. It is a small lens (about an inch in diameter), whereas most
> 16mm projections in the intervening years have turned to the larger barrel
> lenses. It's fairly hard to find a projector today that can handle the
> Bolex 3D lens.

Right!  In my case, a member of the Pasadena Stereo Club who does
frequent metal work on a lathe, made a simple aluminum adapter for me in
one evening. We copied it from an adapter that Dr. John Hart had.  It
consists of a hefty cylinder with the inside diameter matching the Bolex
projection lens barrel and the threaded outside diameter cut to fit the
projector. Now I can use the Bolex lens with my used Bell and Howell
projector, model 1592, which uses only the large diameter lenses.

Cordially,
Oliver Dean