The Canon EOS 5D Mark II is one of the most highly regarded DSLRs of all time, so the 22.3-million-pixel Mark III upgrade has a great deal to live up to. How will it fare?
It is hard to fault the 63-segment metering system of the EOS 5D Mark III. This is the same system as used in the EOS 7D, which is a significant upgrade from the 35-zone metering system of the EOS 5D Mark II.
I got up early to photograph the morning light over the coast and was impressed with how the evaluative metering system of the 5D Mark III coped. Exposures are generally spot on. I rarely used the exposure compensation control, and when I did it was in the kind of situations to be expected, such as when shooting directly into sunlight. On a couple of occasions I did reduce the exposure by 0.3EV, just to make sure that highlight detail was retained, and to help make blue skies look even more vivid.
Indoors, and under artificial light, the performance of the 5D Mark III’s metering was what I can only describe as realistic, with images as bright as the scene being portrayed. Although this was technically accurate, I did find myself increasing the exposure of some images by up to +1.3EV in order to lighten shadow areas and add punch. However, this was of no real concern, being easy to correct using exposure compensation.
Evaluative metering is also linked to the AF point in use, so it is worth remembering this, particularly if you are in the habit of focusing and recomposing. Interestingly, spot metering is only linked to the central 1.5% of the viewfinder, not to the AF point in use. Partial metering, which takes up 7.2% of the frame, and centreweighted average are also available.
Image: A good amount of detail from both highlight and shadow areas can be recovered from raw images