Film-Tech Forum ARCHIVE: Different voltage options for Christie 2215

This is topic Different voltage options for Christie 2215 in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Christopher Lani (Member # 7952) on 06-21-2015, 02:22 PM:

I was wondering how much better the picture is with the higher power bulbs that are available for the Christie 2215.
I mean in terms of picture brightness and if the black parts are darker. I currently use the lowest available wattage. Thanks.

Posted by Carsten Kurz (Member # 5396) on 06-21-2015, 02:29 PM:

Why could a brighter lamp make the blacks blacker? No, if you overlite a screen, the blacks turn even more grey. That's why it is so important to balance light properly, especially with the 0.98" , 0.69" and 4k DLPs with their mediocre contrast.
Don't go beyond 14fL. Balance 2D and 3D brightness as much as your bulb allows. This is very tricky, especially when using Dolby 3D.

What is your current screen size and bulb wattage?

- Carsten

Posted by Christopher Lani (Member # 7952) on 06-24-2015, 03:35 PM:

38' x 14' screen current bulb is the Christie CDXL-16M. I thought that the brightness could effect contrast is the color and white areasy are brighter I thought it might give the overall picture more contrast. That is why I am asking. We do not run 3d. Screen is a +2. So I guess the real question is how do you adjust the contrast

Posted by Randy Stankey (Member # 64) on 06-24-2015, 03:55 PM:

Changing the brightness makes EVERYTHING brighter, including the dark areas.

Try viewing a JPEG image on your computer screen and changing the brightness setting in the adjustments panel.

Changing the brightness by using a stronger lamp or power setting does a similar thing to your movie image.