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Author Topic: Top Down Masking Paul Mayer Oh get out of it Melvin, before it pulls you under! Posts: 3836 From: Albuquerque, NM Registered: Feb 2000 posted 04-16-2004 03:33 PM                        I've only seen bottom masking used in conjunction with other masking. The big screening theater on the Paramount lot comes to mind--all four sides are adjustable.  |  IP: Logged Antonio Marcheselli Phenomenal Film Handler Posts: 1260 From: Florence, Italy Registered: Mar 2000 posted 04-16-2004 03:56 PM                        We have several screens (usually smaller screens) that uses top or bottom masking. The main problem is the light on the image, it could be resolved connecting an electronic rectifier to the automation so that more light can be emitted when flat is chosen. The position of the image is corrected using the lens' holder adjustment (V5). Of course in this case we doesn't use the len's adjustment to correct geometry but only to correct position. The result is that the flat image is a bit dim, the geometry os not perfect but we don't have to move the frame at len's change (of any measure). I personally found this solution good for very small theaters. Bye A  |  IP: Logged Adam Martin I'm not even gonna point out the irony. Posts: 3686 From: Dallas, TX Registered: Nov 2000 posted 04-16-2004 04:11 PM                     Hmmm ... top or bottom .... Anyway ... I once installed temporary *fixed* bottom masking to hide the negative splices in a French film for a festival. But that's it. Useless information, but I got to make the top/bottom joke.  |  IP: Logged Carl Martin Phenomenal Film Handler Posts: 1424 From: Oakland, CA, USA Registered: Feb 2002 posted 04-16-2004 05:07 PM                        eventually we will get bottom masking in our 2 upstairs houses. this will work in conjunction with the side masking that we already have, but doesn't open quite wide enough for scope. this will be ghetto-style bottom masking: a hinged panel which simply flips up for scope. should work fine, though, if it's set up right. carl  |  IP: Logged Andrew Lee Film Handler Posts: 99 From: Oakville, Ontario, Canada Registered: Jun 2002 posted 04-19-2004 07:36 AM                     A few projects that I am working on in the future are indeed retro-fits that do not have the capacity for side masking. Yes, as said by all, if given the opportunity side masking of scope to flat is a no brainer. One project requires top only, therefore giving me no option on keeping the centre reference for scope and flat. Thank you for your replys. They have been most helpful.  |  IP: Logged Daryl C. W. O'Shea Film God Posts: 3977 From: Midland Ontario Canada (where Panavision & IMAX lenses come from) Registered: Jun 2002 posted 04-19-2004 04:51 PM                        BTW... if you can't shim the lenses enough, and aren't using consoles, you could always find yourself some adjustable table pedestals. Definitely beats playing with framing (or even shimming the lens), hands down.  |  IP: Logged Kevin Baglow Expert Film Handler Posts: 135 From: Yeppoon Qld, Australia Registered: Dec 2000 posted 04-27-2004 04:06 AM                        My bottom masking comes up. I have a 6ft curve in my big screen which complicates this. So far we can only change it manually before the show. We use steel upright supports every 6 ft along - holding a curved horrozintal rail that the black masking hangs from. The upright supports slide inside each other in three sections. Motorizing this would cost heaps.  |  IP: Logged

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