CMY conversion sheets

[Sam_Lowers]

Hi all,

 

Not sure if any of you read my last post about Robe and Martin CMY.

 

I have a conversion sheet for MAC CMY to lee and rosco and was just wondering if anybody happened to have one for Robe or know if anybody have made one up at all?

 

Thanks

Sam

[3guk]

http://www.ukslc.org/Technical_Articles/Li...sion_Chart.html

 

and

 

http://www.ukslc.org/Technical_Articles/Li...sion_Chart.html

 

Should work for all movers with CMY mixing.

[Sam_Lowers]

Thanks

Thats really useful.

 

If anyone else has any more information that will be great!

 

Sam

[Tomo]

Please note that these are approximate!

Don't treat them as exact - consider them to be a starting point that will need tweaking to be perfect.

[tom_the_LD]

So CMY is near enough the same in all lights? I thought that it was different dependant on manufacturer

[JimWebber]

It certainly should be, cyan is always going to be cyan, ditto magenta and yellow.

 

A particular Lee filter may pass 10% of cyan, 25% of magenta, and 65% yellow light.

 

It doesn't matter what instruments are used, as long as the values are the same, then the end result should be pretty much the same!

 

Jim

[niclights]

I would say certainly not! As Tomo said, values will be very much approximate. All are different and any general conversion chart will be a starting point. There are different shades of each colour, different 'curves' and methods of graduation in relation to DMX value. Not only do they vary across manufacturer but even individual units can be different. Additionally many accommodate different types of lamp giving options on source colour temp.

[b1nuzz]

I would agree with Tomo and niclights.

 

I use Robe and Martin stuff, both coming from the same Lee > CMY sheet, and they are extremly different. Especially in the 'red' area.

 

It all depends on the quality fo the CMY flags. Different companies make different flags so they will be different.

 

For example, the Martin range struggles with making Red, whereas the Vari*lite stuff can create a beautiful red with the same CMY percentages.

 

Its trial and error making sure you get it right.

[3guk]

Unfortunately the values do vary between heads, that said, those should get you damned close to the colour you are looking for on the majority of heads, granted with various manufactures there might need to be a few edits.

 

Still those sheets should save vast amounts of time compared to starting from scratch !!

[JMC]

Remember you also get Tungsten sources in Macs and VL's etc, which will completely alter the CT of the light, hence all colours will be WILDLY off. Also there's large differences between lights which use Vane VS. Flag mixing systems.

[Tomo]

Still those sheets should save vast amounts of time compared to starting from scratch !!

Actually, I'd guess not.

 

I always build by colour-mix palettes by hand, although importing from previous shows does help.

 

I find it much, much faster to bring up my comparison light, and then dial up the colour mix on the encoders - couple of minutes for each colour, maybe a tweak to cover colour differences between different fixtures of the same type (depending on how fussy I'm being and what the purpose of the palettes are)

 

Then record & name it, and on to the next.

[J Pearce]

But for those with little experience of CMY, it would get them into the right area. Tweaking could then follow.