gel for cool vidLED
- Thread starter Bunyip
- Start date
You're gonna want to use the Mired System to figure this one out, so you can use these sites to 1) learn about it (http://en.wikipedia.org/wiki/Mired) and 2) find out the Mired value of individual gels (http://rosco.com/us/filters/cinegel.asp)
Anyway, to go from 8000K to 5600K, you'll probably want to use a stack of gels that is equivalent to 3/8 CTO (probably 1/4 CTO + 1/8 CTO for a total Mired Shift of +62, putting you ever so slightly warm at about 5450K)
To go from 8000K to 3200K, I'd suggest Full CTO + 1/8 CTO which will give you a total mired shift of +187 Mireds for a Kelvin temp of 3205K. So, as for buying your new light, you need to think about the light loss that the gels cause. It won't be such an issue going to 5600K, but you'll lose close to a whole stop of light going to Tungsten temp. So, even though the 8000K light is supposed to be brighter, my suggestion is to go for the 5600K version, because you can always gel that down to 3200K. That said, if you think you'll be using the thing outside a lot and you're really banking on a lot of punch from the light outdoors, stick with the 8000K because that gelled to 5600K will still be slightly brighter than the 5600K straight.
So, that was very long and probably equally confusing, but I hope some of it helped. Let me know where you're confused.
Peace,
-Harry
Anyway, to go from 8000K to 5600K, you'll probably want to use a stack of gels that is equivalent to 3/8 CTO (probably 1/4 CTO + 1/8 CTO for a total Mired Shift of +62, putting you ever so slightly warm at about 5450K)
To go from 8000K to 3200K, I'd suggest Full CTO + 1/8 CTO which will give you a total mired shift of +187 Mireds for a Kelvin temp of 3205K. So, as for buying your new light, you need to think about the light loss that the gels cause. It won't be such an issue going to 5600K, but you'll lose close to a whole stop of light going to Tungsten temp. So, even though the 8000K light is supposed to be brighter, my suggestion is to go for the 5600K version, because you can always gel that down to 3200K. That said, if you think you'll be using the thing outside a lot and you're really banking on a lot of punch from the light outdoors, stick with the 8000K because that gelled to 5600K will still be slightly brighter than the 5600K straight.
So, that was very long and probably equally confusing, but I hope some of it helped. Let me know where you're confused.
Peace,
-Harry
Hehe, that was not confuing at all Harry, I appreciate you taking the time to explain all of that. My concern was how much light I'd be losing going from 8000k to 3200 and you've pretty much confirmed it. I think, like matt, that I will get the 5600k version.
Thanks for your response gentlemen
Thanks for your response gentlemen