AF review of Eos 1Dx Mk3 by Fro

Kit.

EOR R
Apr 25, 2011
1,700
1,049
I don't see how you could differentiate between a helmeted head sitting in an open cockpit and a basketball.
By the fact of the presence of the cockpit.

That involves gathering and labeling some amount of "ground truths" for the neural net to learn, yes.
 

privatebydesign

Would you take advice from a cartoons stuffed toy?
Jan 29, 2011
8,250
1,601
120
By the fact of the presence of the cockpit.

That involves gathering and labeling some amount of "ground truths" for the neural net to learn, yes.
Thats too literal, what about a helmeted head on a luge, or walking across a pit area, on a motorbike, slalom skiing etc etc....
 
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pj1974

80D, M5, 7D, & lots of glass and accessories!
Oct 18, 2011
624
101
Adelaide, Australia
It also likes that pom-pom a lot, maybe it likes contrasty spheroids?
I am thinking that the intelligent AF actually locks onto an object, which is a combination of being a moving spheroid and a contrasty spheroid.

The reason I write this is because in a number of Jared's/Fro's photos, the blue AF square jumped from being locked onto the stationary person's face (which was still facing the camera enough to be detected as a face) to locking onto the ball or pom-pom. The ball or pom-pom had then become the fastest moving object in the composition, and also was reasonably contrast against the respective backgrounds.

My $0.02.

PJ
 

koenkooi

EOS 7D MK II
Feb 25, 2015
749
512
I am thinking that the intelligent AF actually locks onto an object, which is a combination of being a moving spheroid and a contrasty spheroid.

The reason I write this is because in a number of Jared's/Fro's photos, the blue AF square jumped from being locked onto the stationary person's face (which was still facing the camera enough to be detected as a face) to locking onto the ball or pom-pom. The ball or pom-pom had then become the fastest moving object in the composition, and also was reasonably contrast against the respective backgrounds.

My $0.02.

PJ
This is why I dread changing AF options like tracking and responsiveness, I'm too lazy to setup repeatable tests and take enough time to keep rereading the manual.
Maybe Jared/Gordon/Matt will do a youtube video on it, would save me a lot of time :)
 

Kit.

EOR R
Apr 25, 2011
1,700
1,049
Thats too literal, what about a helmeted head on a luge, or walking across a pit area, on a motorbike, slalom skiing etc etc....
The same. The more scenarios you are providing for the net to recognize persons and find their head positions during training, the better. We are talking about no less than tens of thousands of pictures anyway.

As a bonus, you might be able to estimate where to focus to keep the head in focus even if the head is completely obscured at the moment.
 

koenkooi

EOS 7D MK II
Feb 25, 2015
749
512
Why aren’t we talking about the fact that I can’t see any blackout or lag even with the mechanical shutter here?

and holy smokes that blue square moves on that pompom! That is insanely fast AF tracking.
I really, really, really hope all new R models will get similar performance.
 
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