Re: [photo-3d] Estar Depolarizes

[Steve Berezin <sbere@xxxxxxxxxxxxx>]

Now the Viewmaster projector has polarizers in back of the slides, correct?  So
it will be difficult to project the newer VM reels which use Estar.

Ray Zone wrote:

> 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.

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