1DIII metering

Ok, I am coming from a 40D to the 1dIII. It's a big step but i'm glad I took it. I have metering set to the registered AF point (usually use center point anyway) and using evaluative outdoors, shooting some landscape stuff like I was doing with 40D. It seems the shots are almost alway underexposed or overexposed by as much as 1.5 stops.
I wasn' really into "chimping" with the 40D as it gave real consistant results. I know the mkIII metering is much more complex but I wouldn't have thought it would be thown off so easily. Probably the loose nut behind the wheel?

Different cameras so...

It is probably malfunctioning quite badly.
Please send it to me.

MJA wrote in post #7646917
Ok, I am coming from a 40D to the 1dIII. It's a big step but i'm glad I took it. I have metering set to the registered AF point (usually use center point anyway) and using evaluative outdoors, shooting some landscape stuff like I was doing with 40D. It seems the shots are almost alway underexposed or overexposed by as much as 1.5 stops.
I wasn' really into "chimping" with the 40D as it gave real consistant results. I know the mkIII metering is much more complex but I wouldn't have thought it would be thown off so easily. Probably the loose nut behind the wheel?

Strange.

I tend to shoot in M mode and use an incident light meter. But sometimes this does not work because the light really is changing (spotty clouds or differing distances from light sources) and I need to use Av.

I find that the 5D is OK, but it almost always wants some +EC and it tends to miss my +/- 1/2 stop pretty easily.

I find my 1D3 is actually quite a bit more reliable in evaluative. It usually wants -0- EC and misses by +/- 1/3 stop or less and less frequently.

Try removing the weighting from the AF point. There is no telling what that specifically is doing to the metering calculation.

Set for Matrix metering with 0 compensation for sun, +1/3 or +2/3 for cloudy and definitely +2/3 for indoors. +2/3 with spot for backlit situations. WIll be spot on each time, trust me

There's an active thread covering a lot of ground (including some good "exposure theory" discussions) in this thread:

https://photography-on-the.net/forum/showthre​ad.php?t=670089

You'd want to use Spot exposure if you want to expose using the registered point, but you also want to understand what you're exposing and how to tell the camera what to do with that metered exposure. Check out that thread for some useful discussion. I doubt that your 1D3 is behaving a whole lot differently than the 40D, but it's more likely that you are getting thrown off by different lighting in your scenes.