p.5 #1 · 1Ds3 AF: learning to understand how it works
Jeff wrote:
What I do remember is the fact that the MkIII's AF sensor(s) cover a significantly larger portion of the viewfinder than the area that the little red square presents. In other words, the little red squares are not accurate, as many of us have found with many cameras. How the 5D fares here, I have no idea. I'd love to know just how large an area beyond the red square it is, and if it impinges upon the area of other (assist) AF points.
Of course I have no comparison to other 1D series cameras (or the 1D3 for that matter), but IMO the 1Ds3 AF red squares are covering the actual AF areas pretty tightly. When disabeling AF point expansion the red squares are very precise. You can test this pretty easily in AI Servo. Furthermore, I know for certain that the AF areas of the 5D are a lot larger than the actual red squares. How much larger I can't say for certain.
p.5 #2 · 1Ds3 AF: learning to understand how it works
Hmm. I know Canon has stated the the MkIII's red square is smaller than the actual area of the AF sensor, but I can't recall where (I'll post if I can find).
p.5 #3 · 1Ds3 AF: learning to understand how it works
Jeff wrote:
Hmm. I know Canon has stated the the MkIII's red square is smaller than the actual area of the AF sensor, but I can't recall where (I'll post if I can find).
I don't own/have a 1ds3, but from previous 1 series bodies some info should be n the "Metering Modes" section of the manual, along with a diagram of what area is covered by mode, CF, etc.
p.5 #4 · 1Ds3 AF: learning to understand how it works
Jeff wrote:
Hmm. I know Canon has stated the the MkIII's red square is smaller than the actual area of the AF sensor, but I can't recall where (I'll post if I can find).
I don't know whether Canon has stated it or not but all you have to do is use the camera to know that red box represents only a portion of a particular focus sensor. In a lot of situations it is easy to fool the sensor - which while annoying, is just part of the process.
