MSR to Tungsten conversion

[David Buffham]

We need to convert the output of a Selecon Performer MSR followspot to something nearer to tungsten. The only conversions I can see in the Lee swatch book are from HMI, CSI or CID to tungsten - not MSR

 

Is MSR just another name for, or equivalent to, HMI by any chance?

[Richard Bunting]

MSR is Philips brand name for their single ended HMI, so you should be able to use some Lee 204, 205, or 206. It might be worth using some 205 (1/2 CTO) as you can double this up if if you need to adjust the output.

[peter]

Lee produce a nice booklet (I forget the name of it right now - possibly "The Art of Light"), but it contains a CTC conversion table at the back. Line up the source and destination colour temps and it tells you what filter will give you the closest match.

[David Buffham]

Thank you Richard and Peter - very useful info. The conversion chart you mention, Peter, is on page 39 of this link. We'll try a few colours that shift between +130 and +160 and experiment with what looks the nicest.

 

Thanks again.

 

David

[David Buffham]

PS - if I'm reading it properly doesn't this chart show that, for example, 2 x 202 is NOT equivalent to 201, which I'd always assumed....

 

i.e. 202 shifts by -78 so 2 x 202 will shift by -156, whereas 201 shifts by -137

 

So with a 3200K source, you convert to 5700K with 1 x 201, and around 6470K with 2 x 202.

 

The basis for adding the shifts together for 2 pieces of filter comes from their solution for obtaining -215 - i.e. 201+202 (-78 + -137)

 

Interesting...