scuff wrote:
What do you all typically do with people if you have a cool background? This was taken after/close to sundown on an overcast, cold day. I like how blue it is because we were definitely feeling it at this point. But, I don't want her to look sick. I warmed up her skin a bit. How does it look? What do you typically do in situations like this? I'm torn between thinking she won't match the environment and wanting her to look right.
Cool background in a studio and outdoors are two different things.
When the light is ‘cool’ or bluer outside, and the sky is overcast, you get a lot less red light coming through the clouds. Water absorbs red light, and the high moisture content in the cloud-covered sky just sucks up red light.
On the other hand, the water vapor in the sky allows UV light, and shorter wavelength blue light, to pass freely.
As a result, when you set you exposure, your lens aperture is opened to adjust for the lower intensity (overall) light. Typically this would be two or three stops more exposure on an overcast, cloudy, or heavy overcast day. In relation to the visible light making the exposure, this allows 4 to 8 times more UV light into the camera.
Your eye doesn’t see the UV, but most films and some sensors are sensitive to these wavelengths. As a result, they overly influence the color balance.
In the days of film, the front line of protection was to always use a UV or UV1 protection filter on the lens. These are very slightly yellow. An alternative was the slightly pink Skylight (1A) filter which not only protected from excess UV light but also absorbed some of the excess blue light from scenes in open shade, which were lit by the wide blue sky (cool) and not direct sunlight.
Believe it or not, the arguments over which was a better filter were as intense as today’s political dramas, or Canon vs Nikon rants.
About all anyone could agree on was that these were cheap insurance against some types of physical damage, and you shouldn’t mix them if you wanted consistent color balance between lenses.
These filters can still help with digital cameras. Obviously they give some physical protection. With digital however, different sensors may react to UV light to a different extent. That can vary by manufacturer, or between models. Some manufacturers may already have built in UV protection or absorption as part of the sensors. That would eliminate the need for a filter.
Camera makers already do something similar to remove excess Infra Red sensitivity, and some cameras are modified to restore that range of unseen light and allow IR photography.
With some cameras simply adjusting the white balance before a shot might do the trick. The theory here is that overcast sky has a much different (cooler) color temperature than bright daylight. Carrying (and using) a white card or clean sheet of copy paper is a cheap and simple experiment to see if it helps with your equipment.
If that doesn’t help, you can look for a slightly stronger skylight filter—I believe it is a Skylight1B — or a slight ‘warming’ filter like an 81.
More common is the slightly stronger 81A filter.
This filter cuts the color temperature by 200K, which might be all you need. The 81a filter is designed as a warming filter with interior lighting. It was very popular when using ‘professional’ type A color balanced films designed for 3200K lighting with ‘amateur’ type B 3400K lights designed for home movies and Kodachrome.
Similarly, the other 81 series filters are progressively warmer:
81 filter causes a 100 K warming effect
81 A is 200K warmer
81 B is 300K
81 C is 400K
81 D is 500K
81 EF is 650K
These get you into the realm of ‘ tobacco’ colored filters which have some devotees in the the landscape photography community as they affect the rendition of greenery and can darken the sky without polarization.
I can’t link to it, but if you go to B and H’s website and search for tiffen 81A filter they will have a good description. For that matter, they have excellent descriptions of all the different filter colors I am mentioning. A google search for ‘81A filter’ should get you there.