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» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Why single lens holder? (Page 2)

 
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Author Topic: Why single lens holder?
Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999


 - posted 11-12-2002 03:44 PM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
Yes, the 4" diameter lenses were generally faster. For Drive-Ins where long focal lengths are often employed, the larger lenses (and scope adapters) allowed for brighter pictures.

On the other end of the scale, the 4" diameter lenses allow for very short focal lengths without vignetting.

Steve

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"Old projectionists never die, they just changeover!"

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Gordon McLeod
Film God

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


 - posted 11-12-2002 04:17 PM      Profile for Gordon McLeod   Email Gordon McLeod   Send New Private Message       Edit/Delete Post 
I didn't think they made any 4" diameter lens shorter than 4" (except for some of the newer 70mm lens


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Per Hauberg
Jedi Master Film Handler

Posts: 883
From: Malling, Denmark
Registered: Jul 2000


 - posted 11-13-2002 06:56 PM      Profile for Per Hauberg   Author's Homepage   Email Per Hauberg   Send New Private Message       Edit/Delete Post 
"Why single instead of turret ?"

For a start, try disassempling a cinemec turret and put it together again....

Second: Nothing's better than a big, solid focus-handle with plenty of space around it for fat fingers. -Once again, ladies & gents: The Fabulous Philips DP70 !! (fanfare here)

Third: If You are running repertoire (or dogme-95), You often need the 1,37 - And again the Cinemec turret will steal Your time and spoil Your mild temper, before You're ready after chancing one of the three...

Single lens holder for me again next time, -thank You !

Per

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999


 - posted 11-13-2002 09:47 PM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
4" diameter (101.6mm) has always been at the opposite ends on the focal length scales. The old ISCO "Spezial" lenses were 101.6mm diameter and went down to 31.3mm for 35mm only. Then there was the Kiptikon series of 101.6mm diameter lenses. The B&L Super-Cinephores and Kollmorgan lenses were only of the longer variety, that I am aware.

Steve

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"Old projectionists never die, they just changeover!"

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