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Topic: Parallax error in changeover setups

Scott Norwood
Film God

Posts: 8146
From: Boston, MA. USA (1774.21 miles northeast of Dallas)
Registered: Jun 99

posted 04-21-2001 09:37 AM

Hortson and Philips 16mm projectors also have left-hand-thread designs. I don't think I've ever heard of a 35mm projector that was designed this way, though.

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Jon Bartow
Master Film Handler

Posts: 287
From: Massachusetts
Registered: Nov 1999

posted 04-21-2001 10:12 AM

Randy, If you're going to have mirror image projectors, why not have them back to back (i.e. film on the outside) so that the lens-to-lens distance is minimal? Kind of like what Phil is doing except not 3D.
Jon

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Gordon McLeod
Film God

Posts: 9532
From: Toronto Ontario Canada
Registered: Jun 99

posted 04-21-2001 10:54 AM

One of the Bauer machines in the B serries and the U2 were available for left hand operation

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John Walsh
Film God

Posts: 2490
From: Connecticut, USA, Earth, Milky Way
Registered: Oct 1999

posted 04-21-2001 12:08 PM

Oh, I forgot: I was on a cruise ship with a movie theater... it had a pair of Norelco/Phillps machines (I reconized the style, but I don't know the model number.) They ran regular 35mm on the right side and 16mm on the left.

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Jeffry L. Johnson
Jedi Master Film Handler

Posts: 809
From: Cleveland, Ohio, USA
Registered: Apr 2000

posted 04-21-2001 02:25 PM

_Kings of the Road_, the Wim Wenders film mentioned in another thread, shows a booth with one "normal" and one "backwards" projector.

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Florian Pausch
Film Handler

Posts: 11
From: Wien, Austria
Registered: Dec 2000

posted 04-22-2001 05:59 PM

Left-handed projectors were more or less common in Europe.
Following (german and austrian) builders made such pieces: (from: Herbert Tümmel: Deutsche Laufbildprojektoren, Berlin 1986)
AEG: Euro M, 1936-1939; Euro G, 1938-1944.
BAUER: M 5, 1925-1935; B 5, 1938-1953; B 11, 1957-1968.
ERKO: Erko II, 1927-1935.
ERNEMANN: Imperator/E I, 1914-1933.
FRIEDL-CHALOUPKA: FC I, 1936-1970.
FRIESEKE & HÖPFNER: FH 66, 1949-1954; FH 77, 1953-1961; FH 99, 1954-1961.
NITZSCHE: Saxonia V, 1927-1933.
ZEISS-IKON: Ernemann II, 1929-1935; Ernon IV, 1935-1940; Ernemann IV, 1935-1944; Ernemann VII B, 1937-1944.

Working with "left" projectors is really funny, because everything is in the reach of your arms - no running around the apparatus for the c/o. Usually the amplifiers were situated between the engines on the front wall, the rewind bench in your back.
The running gag of these booths is (was) to explain some greenhorn, that the left projector stands on the right side, the right one on the left.

------------------
Florian Pausch
projectionist, cinema technician, collector
Filmarchiv Austria, Vienna

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Randy Stankey
Film God

Posts: 6539
From: Erie, Pennsylvania
Registered: Jun 99

posted 04-22-2001 10:24 PM

Gee. I guess you can't think of anything, nowadays, that hasn't bee tried at least once or twice, can you?

Yeah! I bet trying to explain the "right" projector and the "left" projector to a newbie could end up looking like an Abbott and Costello movie!

Abbott: "The RIGHT projector is on the LEFT."
Costello: "Right!"
Abbott: "NO! LEFT!"
... etc... etc...

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Dick Vaughan
Phenomenal Film Handler

Posts: 1032
From: Bradford, West Yorkshire, UK
Registered: Jul 2000

posted 04-23-2001 02:41 AM

In my ever useful 1943 edition of "The Complete Projectionist" by R.Howard Cricks there is a picture of a Philips projector with two mechanisms mounted one above the other keeping both on the centreline.The spool boxes are mounted in line behind the mechs. Here is a scan of that picture.

Also somewhere deep in Canyons of My Mind I recall seeing a projector with two 35mm mechanisms back to back .mmm!

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 04-23-2001 06:50 AM

Page 8 of the old (1969 edition) SMPTE Motion-Picture Projection and Theatre Presentation Manual shows the "Optiverter" mirror system used in the "Ultra-Vision" system to minimize geometric distortion when using two projectors.

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Eastman Kodak Company
Research Labs, Building 69, Room 7419
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion

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Larry Shaw
Expert Film Handler

Posts: 238
From: Boston, MA, USA
Registered: Mar 2000

posted 04-23-2001 05:09 PM

The Philips/Kinoton 16/35 machines were FP-26 (earlier, FP-20 + FP-16) and FP-38 (later, FP30 + FP-18). Probably a few 36's and 28's snuck through too.

16 side was on the back door which had a cute little mechanism to hold the door open at the correct angle to correct keystone.

They were available with either one LH and a flipable mirror rig, or two LH's. I don't think hardly any were sold in NA with the single lamp.

The current 35/16, FP-38E, is electronic with dual gauge sprockets. No more seamless changeovers from 16 to 35.

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Florian Pausch
Film Handler

Posts: 11
From: Wien, Austria
Registered: Dec 2000

posted 04-24-2001 06:39 PM

Dear Dick,
Nitzsche of Leipzig made a "double projector", named "Saxonia ZSV" from 1927 onwards, which had a right and a left mechanism mounted back to back on one base, and only one lamphouse.
Kunert of Wilhelmshaven made a similar model, "Gigant", in 1947.
Hahn-Goerz produced a "twin projector", two right mechanisms on the opposit ends of a special base, which could be turned around the single lamphouse.
Erko, Berlin, made a twin apparatus, "Erko II", similar to those of Nitzsche and Kunert, in 1927.
Since it seems, that there was only one lamp mechanism in all types, which slided between head 1 and 2, operators had to be "kings of carbons" to play films longer than three reels.

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