10 hours ago
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Re: I think I understand what your saying
In reply to Bangers and Mash,
3 months ago
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Bangers and Mash wrote:
TTMartin wrote:
Bangers and Mash wrote:
TTMartin wrote:
Bangers and Mash wrote:
I might have asked something along this line before, but I'm having a problem trying to figure out how to lock exposure with any of the movable focus points. It appears that wherever I chose the focus point the camera exposes at the center of the frame. I want to be able to lock focus and exposure at any ONE of the 19 chosen focus points. Can this camera do that? With every dSLR that I have owned in the past I can focus and expose at any given focus point. Could someone assist me with this please. Thanks guys.
Cheers
Wayne
--
"Every day the world turns over on someone who was just sitting on top of it."
What metering mode are you using?
Canon's evaluative metering, weights the exposure to the active auto focus point.
Thank you for responding. I just got off the phone with a Canon rep and he mentions that the only Canon camera that will allow spot metering at any given focus point is the 1DX. All other Canon models will only spot meter at the center point within the frame no matter what focus point I choose. If I chose evaluative metering, the camera will take a valued reading of the entire frame no matter what focus point I choose. So if I choose spot, center weighted of evaluative, the metering starts from the center of the frame. I don't know why they do not allow for spot metering at any given focus point other than their expensive 1DX, but I do know that with all the Nikon dSLR cameras that I have owned, they will allow that. I am disappointed, but what can I do.
Cheers
Wayne
--
"Every day the world turns over on someone who was just sitting on top of it."
Hate to dispute what the Canon Rep told you but:
Evaluative: Metering is directly linked to, and concentrated on, the area around the active AF point, whether you’ve focused on something in the center or off-center. Light values measured at the active AF point are compared with light values measured from the metering segments across the remaining areas of the scene, and the camera's metering system attempts to provide an accurate exposure based on that comparison. This metering pattern is often effective when photographing people, but may not be quite as effective when photographing snowy landscapes depending on other elements in the scene. Note that because Evaluative Metering is linked to active AF points, focusing on a different subject may result in a very different exposure — even within the same scene.
http://www.learn.usa.canon.com/resources/articles/2011/qt_photograph_snow_article.shtml
Let me see if I have this correct. If I select a focus point dead center of the frame, the camera will concentrate the exposure value around that point, but take into consideration the rest of the frame. Now if I was to select the farthest focus point to the right, the camera will concentrate the exposure around that farthest selected point and then evaluate the rest of the frame outward from that point. If that be the case then, it will work very well for outdoor portraits. So if I select a focus point at the subjects face without having to recompose the picture, the exposure will be concentrated on my subjects face, but an evaluation of the exposure outward from that point will be taken into consideration. If the focus point exposure is given more prominence, then this system is truly remarkable.
Edit: This scenario is based on the camera being in evaluative mode, correct?
Cheers
Wayne
--
"Every day the world turns over on someone who was just sitting on top of it."
That is correct.
And, which is why I cringe whenever people recommend not using Evaluative Metering.
If you are shooting manual, I can see taking a spot meter reading, and setting your Tv, Av, and ISO.
But, if you are using any sort of automation in the camera P / T / A or Auto ISO, you are much better off using evaluative metering and if needed exposure compensation.
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