2009--100th Anniversary of 35MM as a World Motion Picture Photography standard!
cin...@hotmail.com
Regards,
Peter mason
Scott Dorsey
What are we actually celebrating? The 35mm width is definitely older than
a century, although I know Edison used round perfs. Are we celebrating
modern BH or KS perfed 35?
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
Ken Layton
cin...@hotmail.com
> In article <fd07ad61-eb21-4657-aeb2-31f72ae1c...@k15g2000yqc.googlegroups.com>,
>
> <cine...@hotmail.com> wrote:
> >Anybody want to have a drink?
>
> What are we actually celebrating? The 35mm width is definitely older than
> a century, although I know Edison used round perfs. Are we celebrating
> modern BH or KS perfed 35?
Yes, Its been around since 1889 but an International agreement was
made in 1909 where most of the
leading countries of the world agreed to use the 35mm gauge for the
production and distribution of
films.
In 1908 Eastman Kodak started using the newly introduced Bell &
Howell perforators(before this
people had to perforate their own films) and these perforators were
far superior to anything available
up to that time. Eastman then started to sell its films preperforated.
This certainly encouraged producers to
adopt the 35mm guage and the following year the international
agreement was made.
Regards,
Peter mason
Peter
> In 1908 Eastman Kodak started using the newly introduced Bell &
> Howell perforators(before this
> people had to perforate their own films) and these perforators were
> far superior to anything available
> up to that time.
Although at that time B&H made most of the lab equipment, Kodak tried
to standardize on KS perfs.
The Eastern Block countries accepted KS as standard for all
appications, principal photography, editorial and release print.
The Western Block countries, where the KS perf was originally
standardized, retained BH perfs for principal photography and
editorial, but accepted KS for release prints.
The reasons are many, but in the last analysis, it is easier to make
absolutely perfect registration pins to the BH standard than it is to
make KS pins to the same degree of precision.
And, as Westren Block producers tended to use their camera equipment
for a wide variety of uses, from principal photography to process
plates, it perhaps made the most sense to retain BH perfs for all those
uses.
Incredibly enough, when Fox standardized on CS perfs, it made sure the
height of the narrower KS-like CS perf was the very same height as the
height of a BH perf (or a DH perf), to minimize, to the greatest degree
possible, weave and other flaws in the release print.
Also, CS perfs were more "tear resistant" than any other perf.
--
CinemaScope�: The Modern Miracle You See without Special Glasses!
Martin Hart
@rattlebrain.com says...
>
> Also, CS perfs were more "tear resistant" than any other perf.
>
It is generally accepted that the CS perf is LESS tear resistant because
of the narrower width of the sprocket teeth which act more like a knife
edge than KS, BH, or DH style teeth.
Marty
--
The American WideScreen Museum
http://www.widescreenmuseum.com/
Steve Kraus
> Also, CS perfs were more "tear resistant" than any other perf.
Oh I get it...because those early CS films were of a type less likely to
evoke tears than say Now, Voyager or Camille.
Scott Norwood
In article <h2jbjt$7bp$1...@news.eternal-september.org>,
Peter <peter...@rattlebrain.com> wrote:
>
>The reasons are many, but in the last analysis, it is easier to make
>absolutely perfect registration pins to the BH standard than it is to
>make KS pins to the same degree of precision.
So, why does film for 35mm still cameras have KS perfs? I realize that
(most) still cameras aren't pin-registered, but BH would have been a more
logical choice, since the Leica was originally intended for use with
motion-picture film loaded into 35mm still cartridges, and it would make
more sense to use motion-picture camera stock in a still camera than it
would to use print stock.
(Not that it really matters; I suspect that almost all 35mm still cameras
would work fine with BH-perf stock.)
--
Scott Norwood: snor...@nyx.net, snor...@redballoon.net
Cool Home Page: http://www.redballoon.net/
Lame Quote: Penguins? In Snack Canyon?
Peter
> So, why does film for 35mm still cameras have KS perfs?
The answer, and most particularly for Kodachrome, is: so the raw stock
won't be used in professional motion picture cameras, all of which (in
the West) have BH pins.
However, because the width of a KS perf is the same as the diameter of
a BH pin, and also beause the height of a KS perf is taller than a BH
pin, BH stock will flow through a camera designed for BH perfed raw
stock, but it will not register correctly.
Note: the height of a CS perf, although it looks like a narrower
version of a KS perf, is the same as the height of a BH pin.
This gives a better result in release printing, which was usually made
from the composited camera negative until the late 1960s.
Peter
> However, because the width of a KS perf is the same as the diameter of
> a BH pin, and also beause the height of a KS perf is taller than a BH
> pin, BH stock will flow through a camera designed for BH perfed raw
> stock, but it will not register correctly.
Oops ...
However, because the width of a KS perf is the same as the diameter of
a BH pin, and also beause the height of a KS perf is taller than a BH
pin, _KS_ stock will flow through a camera designed for BH perfed raw
stock, but it will not register correctly.
(It will not register vertically because of the difference in the
height of the KS perf which is taller than the height of the BH "big
pin", and it will not register horizontally because that function is
dependent upon the "little pin" having the same height as the "big
pin", but not the same diameter. Western professional cameras do not
have a side pressure mechanism, rather these depend upon the "big pin"
and "little pin" functioning in concert to register both vertically and
horizontally).
Scott Dorsey
>
>Yes, Its been around since 1889 but an International agreement was
>made in 1909 where most of the
>leading countries of the world agreed to use the 35mm gauge for the
>production and distribution of
>films.
Have you got a cite or details on the agreement? I run a short film
program at a local festival and would love to have a short bit about it
in the program for the anniversary.
Martin 'Martinland' Schemitsch
> Anybody want to have a drink?
Sure, quite belatedly I'll have a White Russian this very evening, cheers! ;-)
> Regards,
> Peter mason
ML
--
----------------------------------------------------------
"I don't know. I'm making this up as I go!"
(Ford as Dr. Jones Jr. in 'Raiders of the Lost Ark')
----------------------------------------------------------