Big Jay Posted March 28, 2008 Share Posted March 28, 2008 Hi all, this maybe a silly question but is there such a thing as a CMY chart, i.e. a chart that tells how much Magenta and how much Yellow to get a certain colour. Any help would be greatly thanked Tosh Link to comment Share on other sites More sharing options...
woody74 Posted March 28, 2008 Share Posted March 28, 2008 In print, yes (plus black). In light, no; there is the largest variable is the lamp (tungsten vs metal halide, etc...). Any light worth it's salt will be calibrated (or rather, the fixture profile in the desk) to the type of lamp it commonly uses. But I am one man; there will be more replies. -j Link to comment Share on other sites More sharing options...
J Pearce Posted March 28, 2008 Share Posted March 28, 2008 No chart will be fully accurate for every fixture on the planet, but a chart can get you in the right area where you can then tweak. Link to comment Share on other sites More sharing options...
MattR Posted March 28, 2008 Share Posted March 28, 2008 This question has been asked a lot before. As J Pearce says it will get you somewhere near but not 100% of the way. The link below gives you some conversion between CMY and LEE filters although it will vary from lantern to lantern. If you need it, I think there is a Rosco conversion as well somewhere on that site. http://www.ukslc.org/Technical_Articles/Li...sion_Chart.html If you search for "CMY Charts" in the BR you will find lots of other links to various sites as well within threads, HTH, Matt Link to comment Share on other sites More sharing options...
woody74 Posted March 28, 2008 Share Posted March 28, 2008 The link below gives you some conversion between CMY and LEE filters Unless I'm just being a pessimist, why would this be of any use? As far as I have known, CMY mixing does not work with gel and 3 lights because CMY mixing is based on the saturation of the colors in relation to the white of the lamp. -j Link to comment Share on other sites More sharing options...
J Pearce Posted March 28, 2008 Share Posted March 28, 2008 Woody, you've got the wrong end of the stick. The charts show approximate gel equivalents of the mixed CMY colour. Link to comment Share on other sites More sharing options...
MattR Posted March 28, 2008 Share Posted March 28, 2008 The link below gives you some conversion between CMY and LEE filters Unless I'm just being a pessimist, why would this be of any use? As far as I have known, CMY mixing does not work with gel and 3 lights because CMY mixing is based on the saturation of the colors in relation to the white of the lamp. -j Woody, Are you implying using a Cyan/Magenta/Yellow gel in three separate lights and trying to mix them? It's just that is the way that I read your post. What I was thinking of was using something like a MAC600/Robe ColorWash 575at and mixing that way to get the LEE equivalent. That is why I said it would not give perfectly accurate results but somewhere near! Matt Edit - Beaten to it by J Pearce Link to comment Share on other sites More sharing options...
paulears Posted March 28, 2008 Share Posted March 28, 2008 We've been here before, but the spreadsheet with the data you need is here. These values will get you close - but as each fixure type has different filters, they are not exact. Link to comment Share on other sites More sharing options...
woody74 Posted March 28, 2008 Share Posted March 28, 2008 Woody, you've got the wrong end of the stick. Sure enough! ...stepping away from the stick,-w Link to comment Share on other sites More sharing options...
HobitLight Posted March 28, 2008 Share Posted March 28, 2008 Here's one from martin comparing it to Lee filters. It's in percentage (0-100%) by default so you need to click on 'Decimal' at the bottom of the screen to see it in values from 0-255. EDIT: Typo Link to comment Share on other sites More sharing options...
paulears Posted March 28, 2008 Share Posted March 28, 2008 They are Rosco numbers, aren't they? Link to comment Share on other sites More sharing options...
Big Jay Posted March 28, 2008 Author Share Posted March 28, 2008 Thanks for all the replys, this will really help me out with a production I am desiging. Thanks againTosh Link to comment Share on other sites More sharing options...
HobitLight Posted March 28, 2008 Share Posted March 28, 2008 Lee filtersThey are Rosco numbers, aren't they?Sorry, I meant Rosco. :P Link to comment Share on other sites More sharing options...
Caldair Posted March 30, 2008 Share Posted March 30, 2008 *Sidetracking alert* http://www.eastanglianradio.com/cmy-conversion.xls. For a moment there, I hoped that there actually was a radio station with a lighting department. =) Oh well, I suppose there's always the Radio Ballet and TV Martí... Link to comment Share on other sites More sharing options...
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