Re: Can an anamorphic movie still looked vertically stretched when projected with an anamorphic lens?
- From: hchickpeaREMOVEME@xxxxxxxxxxx (Harry Chickpea)
- Date: Sat, 03 Sep 2005 16:17:05 GMT
Martin Hart <namewithheld@xxxxxxxxxxxx> wrote:
>In article <1125725561.474784.326900@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
>lchiu7@xxxxxxxxx says...
>> I recently viewed The Island at a local theater. The AR for the film
>> is 2.35:1 I think (though not sure how it was shot). I noticed during
>> the movie that while it looked like the right lens was being used for
>> projection, the faces of the actors looked a bit stretched vertically,
>> as if the projection lens wasn't quite stretching the image on the film
>> properly.
>>
>> I spoke to the projectionist and he assured me that an anamorphic lens
>> was being used (though didn't say what manufacturer). Clearly it must
>> have been, else the picture would have looked very squeezed
>>
>> Is it possible to have lens that is not quite right and so this
>> situation occur or am I imaging it! We both agreed that the distance
>> from the lens to the screen was not relevant not the distance from the
>> lens to the plate
>>
>
>I can't think of anything, using modern lenses, that would cause this
>effect in projection. If there was not an anamorphic lens in use it
>would be very, very obvious. It just might have been one of those days
>when you get an idea into your head and convinced yourself that things
>looked squeezed.
>
>Now someone can post something that totally explains how this happened.
>I'd be interested in hearing it myself.
>
>Marty
The older lenses were actually prism attachments placed in front of
the prime lens. As such, they were adustable. You could make actors
skinny or fat. (Quite a cool effect the first time you play with it.)
I'm guessing that the theatre doesn't have one of these - although if
it is an old theatre anything is possible. The lens might still be
used because masking can't be corrected easily, etc.
The geometry of some theatres can also be a factor. Too often a
projector port is not centered, but has to sit far to the left or
right because of architectural considerations. If the throw is short
or the booth is high, you add keystoning to that. On a scope picture,
the lens may have to be slightly twisted in the barrel to make the
credit roll have horizontal lettering. Sometimes the projectionist
will consider the bottom of the screen to be the important place for
the horizontal line, since this is the most obvious to a customer
reading the credits. This might have a minimal "squeeze" effect, as
the image is not being unsquoze in the proper manner.
Lenses are also designed to fit a particular projector to screen
distance. There is leeway, but if someone mixed and matched
anamorphic elements and prime lenses, or recycled a lens from a
different theatre, there could be problems.
.
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