jrista said:
neuroanatomist said:
jrista said:
That last bit about automatically switching the AF point...that sounds like the new tracking feature from Sony's AF system. If it does the same thing, then I'm impressed. You would then be able to manually choose a single AF point for getting the initial lock...but the sensor will still use all the AF points to track the subject. THAT is pretty kick-ass...
How is that not what the 5DIII can do now, albeit without tracking data input from the metering sensor? The way the feature is described is exactly how it works on my 1D X.
That isn't how the 1D X or 5D III work. If you use a single AF point, it will only track with the one AF point. You have to use a zone or all points mode to have it use more than one point. I'm making an assumption that what I'm reading is referring to the same functionality of the Sony AF system, where in SINGLE POINT mode, you can lock onto a target, then if the target moves off that point, the AF system will still track with all other AF points.
When I use the 5D III for BIF, if I stray too far from the selected single AF point, the camera will then try to find another subject (which usually fails...as it's usually sky that I'm tracking the bird against.) Maybe the 1D X works differently...I haven't used a 1D X out in the field for more than a few minutes, so I don't know...but it certainly is not a feature that the 5D III has.
In that case, I think you're making an incorrect assumption about the 7DII. The 7DII will behave just like the 1D X (and 5DIII minus metering input). Can you give a Sony model that has the feature you're talking about?
But TBH, I'm still not sure what you're really talking about here. On the 1D X (and 5DIII is the same), in 61-pt auto select
and AI Servo mode (both must be set), you can
manually select any single AF point you want (I actually have different ones preset for landscape vs. portrait orientation), and that's the point that will lock onto the subject. If the subject moves off that point, the
AF system will track the subject across the array of AF points, switching points as the subject moves. No, you're not in single point selection mode, but it works like you describe: "
manually choose a single AF point for getting the initial lock...but the sensor will still use all the AF points to track the subject."
Other than what mode you start in (auto vs. single), how does the Sony system differ? Both let you select the starting point, both automatically switch AF points to track the moving subject.