Toronto Photography Meetup Group

Hi Folks,

Do you know the Kelvin values for the following filters that I want to find?

1. Kelvin value to convert flash light to fluorescent light
2. Kelvin value to convert flash light to incandescent light
3. Kelvin value convert flash light to natural light.

I would really appreciate your help, to save some time.

Thank you.

You are going to need to use CTO or CTB gels to convert. There should be charts online if you google for the info.

Flashes are usually daylight balanced.

Trying to balance to artificial light can be a pain these days since color temperature of even adjacent lights can be all over the map. If you're trying to get color effects gels are fine, otherwise it can be tricky.

Generally works fine no matter what.

A good read on this subject

http://strobist.blogspot.com/2006/03/li ... rrect.html

Read from here Back to light color.

Thank you!

To convert flash to fluorescent light, you need a green gel. I think only red (cyan) and blue (yellow) are expressed in kelvin. Alternatively you can gel all fluorescent light sources in magenta - that's what people shooting motion pictures usually do.

To convert flash to incandescent light, you need an orange (CTO) gel, usually 1/2 CTO (to give the viewer a sense of "incandescent" and warmth) or full CTO (neutral). Alternatively you can gel all incandescent light source with blue (CTB) accordingly.

As sliua mentioned, flashes are usually daylight balanced (~5500k) which don't need any modification outdoors. Some people would still like to use 1/4 or even 1/2 CTO to give a warmer skin tone, or to balance the sunlight in early morning or late afternoon; equally a weak CTB gel for overcast and shades.