[photo-3d] Estar Depolarizes

[Ray Zone <r3dzone@xxxxxxxxxxxxx>]

Sheldon Aronowitz wrote:

> My entire run of the John Kennedy memorial a while back were all
> on Dale Labs film.  Can anyone explain why this happens?  Are there other
> films to look out for?
> Sheldon

Ray Zone responds:

The Dale Labs film is made on the newer Estar-based film which depolarizes
the light when the polarizers are BEHIND the slides to be projected (in this
order): lamp-polarizer-slide-screen.   The solution is to use a projector
that has the polarizers in FRONT of the stereo slides in projection:
lamp-slide-polarizer-screen.

Expect to see Estar base films becoming more common.  The advantage of Estar
is that it is much more stable and archival than older cellulose-based
films.  Estar base is used increasingly more for motion picture films
because of its dimensional stability and archival life which is 4-5 times
that of the older base films.