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Re: non-linear horizontal distortion in anamorphic DVD

Posted by arie on 06/06/06 19:11

Thank you, Sean.
I think you are right. I observed this phenomenon on another Pasolini's
movie, "Gospel according to St. Mathew"released by Tartan. Probably,
there was a problem with the lenses he used at that time (about
1962-63)

Arie

Sean O'Hara wrote:
> In the Year of the Dog, the Great and Powerful arie declared:
> > Recently, I have acquired a DVD movie "Mamma Roma" by P.P.Pasolini
> > issued by Criterion, which is famous for its high-quality digital
> > remastering of old movie classics. The disk is anamorphic 16:9, and the
> > image fills the screen of my 16:9 LCD display (BENQ, 32") in the
> > Full-screen or Anamorphic mode, supposedly undistorted. To my great
> > disappointment, when the movie gets to slow horizontal panning takes of
> > a static landscape (there are quite a few of them in the film), I see
> > gradual distortion of the objects in the frame as they cross the screen
> > from, say, the right margin to the center and then to the left margin.
> > This effect is very disturbing to eyes.
>
> This has nothing to do with the DVD -- it's how the movie was filmed.
>
>
> 35mm film, which most movies are shot on, have a squarish frame. To
> create a widescreen image, there are two main methods. The first is
> to shoot "flat" and then crop off the top and bottom of the frame to
> the intended aspect ratio. The second is to use anamorphic lenses,
> which capture a wide vista and compress it horizontally to fit on
> the 35mm film. When it's projected in theater, a lens is used which
> reverses the process. (Note that "anamorphic" in the sense of lenses
> is completely different from "anamorphic enhancement" on DVDs.)
>
> Anamorphic lenses -- and this is especially true with the earliest
> ones -- create distortions that become noticeable when the camera
> pans around.
>
> --
> Sean O'Hara | http://diogenes-sinope.blogspot.com
> Leela: Uh, Professor, are we even allowed in the Forbidden Zone?
> Professor Farnsworth: Why of course! It's just a name. Like the
> Death Zone, or the Zone of No Return. All the zones have names like
> that in the Galaxy of Terror.
> -Futurama

 

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