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Author Topic: Lens Calculator Eric Womack Film Handler Posts: 23 From: Pickerington, Ohio Registered: Aug 2007 posted 07-25-2008 04:12 PM                     Searching for a piece of software that will calculate image size, lens size based on throw distance and desired image size. Any one know where I can find that? i think there was one called lenscalc.exe.  |  IP: Logged Adam Martin I'm not even gonna point out the irony. Posts: 3686 From: Dallas, TX Registered: Nov 2000 posted 07-25-2008 04:35 PM                     There are a couple right here on Film-Tech.  |  IP: Logged Eric Womack Film Handler Posts: 23 From: Pickerington, Ohio Registered: Aug 2007 posted 07-25-2008 06:25 PM                     Thanks Adam. Sooner or later I'll learn to not ask stupid questions and look a little more at this site and see before I make a fool out of myself  |  IP: Logged Galen Murphy-Fahlgren Master Film Handler Posts: 405 From: Canton, MI, USA Registered: Oct 2007 posted 07-26-2008 12:09 AM                     Neat. I was planning on writing one a few months ago, but never got around to it.  |  IP: Logged John Wilson Film God Posts: 5438 From: Sydney, Australia. Registered: Dec 1999 posted 07-26-2008 12:15 AM                     Here you go Galen. One of your very own.  |  IP: Logged Galen Murphy-Fahlgren Master Film Handler Posts: 405 From: Canton, MI, USA Registered: Oct 2007 posted 07-26-2008 02:28 PM                     I may have misrepresented myself. When I said I was planning on writing one, I meant I was planning on making my software engineer father do it.  |  IP: Logged Galen Murphy-Fahlgren Master Film Handler Posts: 405 From: Canton, MI, USA Registered: Oct 2007 posted 10-30-2008 11:00 AM                     Does anyone know of an html based calculator? I run Mac, and am not particularly interested in booting power sucking Windows every time I want to use such a one. If not, I guess I will have to make my own. I'm looking for something pretty variable, so I can enter a couple of criteria (picture area, focal length, throw, projected image size) and have it produce the output I'm looking for.  |  IP: Logged Robert Minichino Master Film Handler Posts: 350 From: Haskell, NJ, USA Registered: Dec 2005 posted 10-30-2008 11:06 AM                        For what it's worth, the Schneider calculator works great with Wine on my Linux system.  |  IP: Logged Sean Weitzel Jedi Master Film Handler Posts: 619 From: Vacaville, CA (1790 miles west of Rockwall) Registered: Dec 1999 posted 10-30-2008 12:08 PM                     www.cssinc.com used to have a web based one last time I checked. The site currently appears to be down at present.  |  IP: Logged William T. Parr Jedi Master Film Handler Posts: 823 From: Cedar Park, TX Registered: Nov 2000 posted 10-30-2008 02:41 PM                     I just got into the ccsinc website and used the calculator.  |  IP: Logged Galen Murphy-Fahlgren Master Film Handler Posts: 405 From: Canton, MI, USA Registered: Oct 2007 posted 10-31-2008 11:41 AM                     The CSS is exactly the sort of thing I'm looking for. I'd also like 16mm support, but that can wait until I get off my duff and make my father write one to my specifications. Thanks!  |  IP: Logged Scott Norwood Film God Posts: 8146 From: Boston, MA. USA (1774.21 miles northeast of Dallas) Registered: Jun 99 posted 10-31-2008 12:25 PM                        Alternative option: International Cine in Miami, FL sells a cardboard slide-rule lens calculator that covers pretty much every format known to man. It's not as sophisticated as the Schneider software, but it's easy to use and more convenient than carrying around a laptop (or doing the math by hand) at film festivals and similar events. Another thing that I have done is memorize some common focal-length/throw distance/screen size combinations, since those can be easily re-used (e.g. doubling the throw distance without changing the lens will double the width and height, increasing the image by 4x).  |  IP: Logged John Hawkinson Film God Posts: 2273 From: Cambridge, MA, USA Registered: Feb 2002 posted 10-31-2008 04:49 PM                     At that rate, Scott, someone should just make up a PDF file of a nice set of facts and nomographs and soforth. You could even do a sliding paper affair like Andy Kinsman (of Kodak!)'s PostScript slide rule (in PDF). --jhawk [ 10-31-2008, 07:44 PM: Message edited by: John Hawkinson ]  |  IP: Logged

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