Color correcting 3000K -> 3500K or so?

[CC]

Hi:

I'd like to find a *very* mild color correcting glass to put over a
3000K warm white CMH lamp to shift it just a bit to the 3500-4100K
range, but without loosing much light.

Any idea where to get such a beast?


Thanks.

 

[keith]

Hi:

I'd like to find a *very* mild color correcting glass to put over a
3000K warm white CMH lamp to shift it just a bit to the 3500-4100K
range, but without loosing much light.

Any idea where to get such a beast?


Thanks.


--
_____________________
Christopher R. Carlen
[email protected]
SuSE 9.1 Linux 2.6.5

if you dont *have* to use glass, i feel a LEE Filters 203 (1/4 CTB)
would do it for you.
http://www.leefilters.com/LP1.asp?PageID=32

also see andy's page:
http://www.tvtechnology.com/features/let-there-belighting/f_let_there_be_lighting-07.07.04.shtml

 

[David Lee]

keith wrote...

if you dont *have* to use glass, i feel a LEE Filters 203 (1/4 CTB)
would do it for you.

203 would be a bit weak. 3000 to 3500-4100K is a Mired shift of -50 to -90.
and 203 has a Mired shift of -53 and so will shift you only to 3350K. Lee
202 (1/2 CT Blue), with Mired -78, would be a better choice and would take
you to 3920K. (It's actually designed to shift 3200K tungsten to 4300K
daylight).

David

 

[Simon Waldman]

if you dont *have* to use glass, i feel a LEE Filters 203 (1/4 CTB)
would do it for you.
http://www.leefilters.com/LP1.asp?PageID=32

Lee now sell a range of dichroic glass filters, including some fairly
subtle tints. Chances are that there's a CT blue amonsgt them... might
not be the right strength, but worth a look.

 

[David Lee]

Simon Waldman wrote...

Lee now sell a range of dichroic glass filters, including some fairly
subtle tints. Chances are that there's a CT blue amonsgt them... might not
be the right strength, but worth a look.

See http://www.leefilters.com/LPARCG.asp?PageID=452: Half CT Blue. Custom
sizes available.

David

 

[CC]

Simon Waldman wrote...

See http://www.leefilters.com/LPARCG.asp?PageID=452: Half CT Blue. Custom
sizes available.

David

That might be perfect, thanks.

 

[David Lee]

David Lee wrote ...

203 would be a bit weak. 3000 to 3500-4100K is a Mired shift of -50
to -90. and 203 has a Mired shift of -53 and so will shift you only to
3350K. Lee 202 (1/2 CT Blue), with Mired -78, would be a better choice
and would take you to 3920K. (It's actually designed to shift 3200K
tungsten to 4300K daylight).

Just noticed that the above is inconsistent - seem to be numerically
dyslexic! Mired is actually -35 for Lee 203 (not -53) so the comments were
correct.

Sorry

David