wolfiebear wrote:
I set it all manually by what I think will work. . .considerably over what the camera would meter to make the snow 18% grey instead of white. I tend to be pretty close . . .
What does throw me is the darn LCD screen. I go to looking at that in the bright light to see if my exposure is dead on, so sometimes I readjust my settings based on what I think see in the LCD screen (which is usually wrong). . . only to find out I was right in the first place. AH-ahhaha
The LCD is either a curse or a blessing, depending on what you have it display. If all it is used for is to look at the image itself... that is a real curse! Configure the camera to show you information, not the picture! Look at the histogram and/or a highlight indicator (I'm not familiar with the Canon 5DII, so I'm not sure exactly what it has or how to configure it).
Never ever judge color, brightness or contrast by looking at the LCD display of a preview image. That just does not work. (It doesn't work very well on a really good full sized screen, so how can an itty bitty screen be helpful!)
wolfiebear wrote:
Now, I pose a question for you:
You mention how in #2 some of the snow reads "right"
but the shadow part does not. I believe it is a delicate balance where the eye needs to be fooled into "feeling" it looks accurate.
So how would you propose to expose it so the highlighted part reads correctly, but the shadow part is still correct too? Is that possible?
Our eyes are easy to "fool", they adjust to give us the most useful "reality". Cameras don't.
You are right about how using the meter reading directly will cause white snow to be 18% grey. The light meter averages an area, and never shows the peak values. Snow is very nearly pure white and it is critical to get it close but never so bright that it clips. Trying to figure that out looking at the image itself is not possible; trying to figure that out with a light meter is a tricky process; doing it with an histogram is relatively easy!
One problem with your scenes and metering is that with dark trees and bright snow the meter reading will fluctuate wildly depending on how much if each the meter can see. You can't just set Exposure Compensation to +1 EV, because the next scene will be more snow with fewer trees and it should be set to +2 EV. Then the next on will be less snow and more trees and EC should be +0 EV. If you use the meter to set exposure you have to make a judgment call on every single exposure!
The histogram will let you set exposure perfectly. Take a shot and look to see what the histogram shows. Put everything into Manual Exposure and turn off AutoISO. It may take a couple tries, but when the right edge of the histogram is just back from maximum, it's nailed. As long as the light stays the same it will make no difference how the scene changes!
The only times to change the settings are when the clouds move and cause more or less obscuring of the sun, or if you shoot a scene that is entirely in the shade as opposed to direct sunlight.
The color of light is interesting too. The light directly from the sun is a warmer color than light that is filtered through and reflected off the sky, and that is warmer than light reflected from clouds. So if the bright sunny slopes illuminated by direct sunlight look right, the shadows will be illuminated only by light filtered by much more atmosphere, and will look more blue. The bright white snow however, might also reflect a lot of a bright blue sky! So there are a number of ways to get a lot of excess blue into snow pictures.
Shoot RAW! You can adjust White Balance later. Just realize that you can't change the light that exists when the picture is taken. If White Balance is changed to make one part of the image warmer, it makes other parts warmer too, even if they don't need it.