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Author Topic: Master Image Filter Wheel question Jim Cassedy Phenomenal Film Handler Posts: 1661 From: San Francisco, CA Registered: Dec 2006 posted 05-08-2015 02:15 PM                     Are the polarizing filters of a Master Imgage 3D system sandwiched inside the spinning glass disk, or are they applied to one of the exterior surfaces? (In other words- - what I'm trying to find out is how "protected" the actual filter material is from damage when cleaning the disk, etc) Tnx!  |  IP: Logged Kris Verhanneman Expert Film Handler Posts: 182 From: Belgium Registered: Dec 2009 posted 05-08-2015 02:30 PM                     Hello, the filter is on the outside of the disk. You can scratch it. (talking about the rotating disk version not the horizon version).  |  IP: Logged Stephan Shelley Jedi Master Film Handler Posts: 854 From: castro valley, CA, usa Registered: Nov 2014 posted 05-08-2015 08:21 PM                     The disk is plastic and as such both sides can scratch.  |  IP: Logged Marcel Birgelen Film God Posts: 3357 From: Maastricht, Limburg, Netherlands Registered: Feb 2012 posted 05-09-2015 11:43 PM                     The disc indeed seems to be some sort of plexiglass. I have never given it much thought, but isn't the disc far to thick for just a linear polarizer and retarder? Sure, you need a certain thickness to ensure stability, so wouldn't it actually make some sense to put those layers inside the disc, sandwiched between a protective layer of clear plexiglass?  |  IP: Logged Stephan Shelley Jedi Master Film Handler Posts: 854 From: castro valley, CA, usa Registered: Nov 2014 posted 05-13-2015 05:57 PM                     Not sure if they are sandwiched or just laminated to one side the polarizing material.The main body is polycarbonate. Much stronger than acrylic.It does spin at a very high speed.  |  IP: Logged Justin Hamaker Film God Posts: 2253 From: Lakeport, CA USA Registered: Jan 2004 posted 05-13-2015 06:41 PM                        The disc is definitely plexiglass. The 'wedges' are some sort of plastic or vinyl which are adhered to the disc. Not sure if they are laminated or just an adhesive, but they can be pealed off is you're not careful.  |  IP: Logged Phil Ranucci Expert Film Handler Posts: 236 From: Carpinteria,CA, United States Registered: May 2006 posted 05-13-2015 10:46 PM                     When cleaning don't spray the disc, spray the microfiber cloth. If the filter gets wet it will peel off and make a racket when it gets up to speed.  |  IP: Logged

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