8mm Forum: Filter for correcting the projector light?

This is topic Filter for correcting the projector light? in forum 8mm Forum at 8mm Forum.

To visit this topic, use this URL:
https://8mmforum.film-tech.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=1;t=001584

Posted by Winbert Hutahaean (Member # 58) on November 17, 2005, 01:32 AM:

Now I got disturbed with my ordinary bulb, since it is only EFR (12v 100w) resulting warmth color tempurature produced by this tungsteen light. Someone suggested to put filter in front of the lens. So what is the correct filter to whiten the light?

Thanks for your suggestion.

Posted by Jan Bister (Member # 332) on November 18, 2005, 12:43 AM:

I would think you'd want to go with something with a very light bluish hue to put in front of the lens.
But IMHO, EFP 12V/100W put out the same white tungsten light that EFR (150W) and ELC (24V/250W) bulbs do... just with less brightness of course. The only proper way to get a whiter (cooler) light, as far as I know, is to go with xenon lamps.

What brought on the sudden dissatisfaction with your EFP bulb, I wonder?...

Posted by Douglas Meltzer (Member # 28) on November 18, 2005, 08:15 AM:

Winbert,

You might want to try one of these color conversion filters. As Jan said, light blue would be the way to go to reduce warmth.

82A,B,C

The 82A is the lightest blue, with the smallest amount of light loss (approx. 1/3 of a stop).

There's also the 80 series (80A,B,C): color compensating filters that subdue or suppress predominantly warm or reddish tinges but these are darker and would eat up quite a chunk of that 100 watter.

Doug

UBB.classic^TM 6.3.1.2