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» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Realligning Scope lens on V8

   
Author Topic: Realligning Scope lens on V8
Ross McLaughlin
Film Handler

Posts: 24
From: Worthing, West Sussex, UK
Registered: Feb 2012


 - posted 05-28-2012 07:40 PM      Profile for Ross McLaughlin   Email Ross McLaughlin   Send New Private Message       Edit/Delete Post 
Hi,
Just after a quick piece of advice. Our scope lens on our Victoria 8 twin-lens turret is playing too low (it's not the racking). The guy who was in charge before me reckons it was changed by the guys who installed our Technicolor 3D lens (what a waste of time that was).

As i'm now sure I won't be using the 3D lens again, i'm looking to reallign the scope lens so I don't have an ugly blank space at the very top of the screen - but don't know how to do this myself. Has anyone got experience of this that could helpfully shed some light my way?

Many thanks.

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Victor Liorentas
Jedi Master Film Handler

Posts: 800
From: london ontario canada
Registered: May 2009


 - posted 05-28-2012 08:14 PM      Profile for Victor Liorentas   Email Victor Liorentas   Send New Private Message       Edit/Delete Post 
It depends on what type of turret you have. If its the type I have you should see tiny Allen keys on the outside round of the turret,2 per lens. Loosen those nearest scope lens. Then there are concentric screw adjustments above and below the lens turret front with your back to the screen. One moves lens side to side, the other up and down. At the end you will have to re straighten the scope lens. Do this at the end of night with a film loop running.

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Leo Enticknap
Film God

Posts: 7474
From: Loma Linda, CA
Registered: Jul 2000


 - posted 05-30-2012 12:21 PM      Profile for Leo Enticknap   Author's Homepage   Email Leo Enticknap   Send New Private Message       Edit/Delete Post 
As Victor points out, unless the anamorph is on a separate bracket that swings into place and the prime lens is in the turret, adjusting the position of the lens barrel in the turret will also throw out the horizontal position of the anamorph, with the result that you'll have to realign it using a test film (e.g. RP-40).

If the prime backing lens and anamorph are in a single unit (or are separate but screwed together), might it be a bit easier to adjust the height of the projector pedestal to get the vertical position of the 'scope picture right, and then adjust the other prime lens(es) in the turret using the method Victor describes?

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Louis Bornwasser
Film God

Posts: 4441
From: prospect ky usa
Registered: Mar 2005


 - posted 05-30-2012 08:20 PM      Profile for Louis Bornwasser   Author's Homepage   Email Louis Bornwasser   Send New Private Message       Edit/Delete Post 
The scope lens should not be used to change elevation. In fact, the backup lens should be used alone and the center of the test film marked on the screen. The anamorphic should then be adjusted so that the centers agree. Then aim the overall projector. louis

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Ross McLaughlin
Film Handler

Posts: 24
From: Worthing, West Sussex, UK
Registered: Feb 2012


 - posted 06-06-2012 06:57 PM      Profile for Ross McLaughlin   Email Ross McLaughlin   Send New Private Message       Edit/Delete Post 
Thanks for the advice guys.
Been away from a pc for a few days so missed all but Victor's responses, but it worked at treat. Really great, thanks.

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