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Author Topic: DCI Projector lens Nastia Motovilova Film Handler Posts: 30 From: Nicosia, Nicosia, Cyprus Registered: Sep 2012 posted 05-07-2013 01:38 PM                    Hello, I have been looking at various DCI projectors and the available lens options in the manufacturers' page. Lenses usually begin from 1.25 going upwards. Is there a particular reason for this? For example why there are no lens options with 1.0 or lower? I've checked the DCI specification document but it doesn't provide any guidelines regarding lens specifications (or maybe there is one but I haven't found it). If anyone could provide any info it would be great. Thanks!  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 05-07-2013 02:36 PM                     The reason is probably that there are few screens/auditoriums with a need for such short lenses. Some are available aside from the standard lists, but wide angle lenses usually have their issues as well. - carsten  |  IP: Logged Gavin Lewarne Master Film Handler Posts: 278 From: Plymouth, UK Registered: Aug 2009 posted 05-07-2013 05:19 PM                     We have a 12m throw to a 6m wide (common height) screen. Using a 1.95-3.2 lens on our barco and the ratios are perfect and actually within a couple centimeters off the masking for our 35mm  |  IP: Logged Nastia Motovilova Film Handler Posts: 30 From: Nicosia, Nicosia, Cyprus Registered: Sep 2012 posted 05-08-2013 08:09 AM                    I see. I initially thought that there may be a DCI limitation i.e. you cannot use a lens below for example 1.0. As I understand this is not the case. Thanks for the replies!  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 05-08-2013 08:40 AM                     And TI charges lens manufactures a big licenseing fee as well  |  IP: Logged Nastia Motovilova Film Handler Posts: 30 From: Nicosia, Nicosia, Cyprus Registered: Sep 2012 posted 05-09-2013 04:12 AM                    Thanks for the tip Gordon. Out of curiosity, is there a DCI requirement that a projector needs to be installed in a specified projection booth? i.e. can the projector be installed in an open space, if this of course is practical while having the server in a room? Thanks!  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 05-09-2013 06:45 AM                     DCI has no objectives there. As long as the projection guidelines regarding brightness, image distortion, etc. are met, it doesn't matter where or how the projector is operated. Projector and server usually create quite some noise, so 'open space' is usually prohibited. Boothless usually means mounting the projector or server in a large, ventilated hushbox. - Carsten  |  IP: Logged Ken Lackner Phenomenal Film Handler Posts: 1907 From: Atlanta, GA, USA Registered: Sep 2001 posted 05-09-2013 07:54 AM                     quote: Nastia Motovilova various DCI projectors Isn't that kind of like calling yogurt that has been approved by the FDA "FDA yogurt?" DCI neither manufactures nor puts their name on equipment.  |  IP: Logged

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