cygone wrote:
I observed a Portrait tutorial concerning metering (outside) for exposure using Spot (just under the eye) while in Manual. The model was metered about 6 feet away, exposure was dialed in, and model was then placed maybe 15 or 20 feet away. My question is.....I must meter in the same light as the light where my model ultimately poses?
Also....if I use Aperture Priority instead of Manual, I would move the focus point on the eye, lock focus, and the meter reads the light at the same time? What metering mode would I use?
Also....isn't manual mode the best way to go? I would set my F-Stop (using my either 85mm 1.4 or 135mm f2 lens) to, say, f5.6., ISO to 100, then spot meter to determine shutter (And change ISO until I had a fast enough shutter speed for my shaky hands).
Then I would just have to worry about focus on the eye (using the center focus point, Single focus, and recompose)?
Am I on the right track here?
I observed a Portrait tutorial concerning metering... (
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Yes, mostly. Untanned caucasian skin can reflect as much as 2/3 stop more light than middle gray, and Indian/African skin can reflect as much as 2/3 stop less light. Within the face itself, the reading can vary up to a stop or even more between shadow and highlight.
In digital, the goal is to measure the highlights that you want to retain detail in, and set your camera to allow one stop more light. Using the spot meter function in the camera, or a hand held meter will isolate the bright area from adjoining ones that are reflecting less light. I would not necessarily resort to using a lower exposure for darker skinned individuals, as long as nothing important in the rest of the scene is over exposed. It is best if you can record as much image data as possible, even if it means you adjust the exposure in post processing.
This technique will absolutely ensure in 100% of the situations that you will not overexpose (clip the highlights) in any image, portrait or not.
If the light changes (model moves to a new place, for instance), you'll have to re-measure the light. If you move yourself to a new location but the model remains in the same place (and in the same light), you have nothing to worry about, you can use your exposure settings.
Aperture priority has nothing to do with focus points, BTW. It just allows you to set the aperture and allows the camera to calculate the shutter speed based on your ISO setting.
Auto Focus is a function that is separate from what you use to determine your exposure settings.
If you use single point focus, either by setting the AF drive mode to single shot or set it to continuous but using a single focus point (you can usually use more if your camera offers more), moving the focus point to the eye is usually a good idea, especially if you are using a fast medium telephoto lens at it's widest aperture, since it is possible that the nose and ears will be out of focus. But be careful that in recomposing, the distance that you used to focus on the eye may be different after you recompose. At F5.6 you are less likely to encounter a meaningful focus distance change that will cause image softness.
It's a good idea to move the focus point in the viewfinder as close as you can to where they eye is in order to minimize the amount of recomposing you'll have to do.
If you are lucky enough to be using a Sony camera, it has a focus mode override that does facial recognition and finds the eye, and regardless of what focus mode you are using it will focus on the eye.
You can get more detailed information in the Portrait section.