AF, 5d mark iv & 7d mark ii

RogerZoul said:

rsmithsd73 said:

I have both, I shoot birds and wildlife, and I'm thinking about selling the 7DII. If you are interested, check out birdphotographers.net and look for Arash Hezeghi's thoughts on the 5DIV vs 7DII. In short, the AF is far more reliable in the 5DIV. The 7DII is known to have a "twitchy" AF and in my short experience, the 5DIV AF yield far higher yield rate of in focus images.

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The only issue I find with this is that it doesn't fit my experience with my 7D2 which I have been shooting with since November 2014. The AF is not twitchy. Also, I have been shooting with the 5D4 this week (from Canon CPS) and I don't find the AF yield any higher. In fact, since all the AF squares are crammed into the center compared to those on the 7D2, the hit rate might be lower. The IQ on the 5D4 is great though and compared to my 6D, the 5D4 is certainly a big plus and worth adding to the kit. But I think there are those who have good 7D2 and there are those who don't, and thus it depends, when comparing to the 5D4. Certainly, if you don't have or want a 600mm f/4, the 7D2 (if it works) is a worthy option since you can get the 100-400 m2 or the 400 f/4 DO2 as to use with the 7D2.

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It did take me a while to adjust to the AF points area. I don't have a twitchy 7D2 either.

MaxCh said:

MaxCh said:

Canon and Zeiss Stuff. Mac Stuff & annoying PC & Windows stuff.

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I have both 7d2 and 5d4 and I can't tell for sure if 5d4's AF is better I assume it is better simply because it is apparently similar on 1DX. However, I am not seeing any obvious differences when I use the cameras. I always thought it is very difficult to compare AF modes in general because most action is not easily reproducible.

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Actually its AF is very close to the 1Dx MkII. No one has even suggested a "good" 7D2 AF is the equal of the 1D MkIV.

MaxCh said:

I certainly miss the faster FPS feature on my 5d4. However, I do get a higher keeper rate with 5d4. In another words, I take a bunch of shots of my kids running around with 7d2 and then a bunch of shots with 5d4, then 5d4 shots are always sharper, more focused and look better in general. It is possible it is a placebo effect. It is also possible it is a function of other factors.

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Yup! But that's not a full blow Roger Cicala style statistical analysis.........

--
Blake in Vancouver
Canon and Zeiss Stuff. Mac Stuff & annoying PC & Windows stuff.

RogerZoul said:

Blake Cook said:

RogerZoul said:

While I'll grant that there are some number of 7D2's that AF is an issue I have not read anywhere that the 7D2 AF is the equal of the 1Dx or 1Dx2. On the other side there are many who consider the 5D4 AF the equal of the 1Dx2 other than FPS and with a 2xtele attached.

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Who said anything about the 7D2 AF being the equal to the 1Dx? I am not responding here to the OP but to the poster saying there is some twitchy business with the 7D2s AF as though it is a known fact or something. It is not. In any case, I'm not making any statement about 7D2 being better than 1Dx 1 or 2.

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If A is not as good as B and B is equal to C, then A is not the equal of C.

You figure which is which.

Blake Cook said:

MaxCh said:

Blake Cook said:

Canon and Zeiss Stuff. Mac Stuff & annoying PC & Windows stuff.

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I have both 7d2 and 5d4 and I can't tell for sure if 5d4's AF is better I assume it is better simply because it is apparently similar on 1DX. However, I am not seeing any obvious differences when I use the cameras. I always thought it is very difficult to compare AF modes in general because most action is not easily reproducible.

Click to expand...

Actually its AF is very close to the 1Dx MkII. No one has even suggested a "good" 7D2 AF is the equal of the 1D MkIV.

Blake Cook said:

I certainly miss the faster FPS feature on my 5d4. However, I do get a higher keeper rate with 5d4. In another words, I take a bunch of shots of my kids running around with 7d2 and then a bunch of shots with 5d4, then 5d4 shots are always sharper, more focused and look better in general. It is possible it is a placebo effect. It is also possible it is a function of other factors.

Click to expand...

Yup! But that's not a full blow Roger Cicala style statistical analysis.........

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It is sure not a statistical analysis . My "analysis" is based on taking 450,000 images with 7d2 and about 20,000 with 5d4. According to this "analysis", I am getting more keepers with 5d4. However, I can't really tell if AF systems are all that different.

Is it even possible to really compare AF systems just like one would compare IQ of different lenses? When people compare lenses they put the camera on a tripod and photograph a brick or something. I don't know how you can really design a test for AF.

I recall there was a controversial thread on the 7D forum few years back about some reviewer/expert (can't recall his name) who compared AF systems of 7d2 with Sony a6000 and declared that Sony AF was better. As I recall, he just took a lot of pictures of skiers and decided that Sony a6000 was performing better.

Blake Cook said:

--
Blake in Vancouver
Canon and Zeiss Stuff. Mac Stuff & annoying PC & Windows stuff.

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