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Thread started 12 Nov 2014 (Wednesday) 14:59
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7D Mark II - Focus Discussions

 
butterfly2937
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Nov 07, 2017 10:35 |  #7036

digital paradise wrote in post #18490761 (external link)
There were also some questions about TS -2 and +2 effecting initial AF acquisition speeds. I set the cam on a tripod and picked a good high contrast target. I defocused, then auto focused. I defocused it again and put pieces of tape on the lens so I would defocus the same amount between tests.

As I expected I did not see any difference between TS -2 and +2.

Did you see an increase in how quickly it switched between targets as your TS increased? At least on the 1DX II I can tell the difference in the time it takes to refocus if you move completely off the subject. You are correct it as no effect on initial AF speed at the start of AF. Is that what you mean?


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digital ­ paradise
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Nov 07, 2017 10:47 |  #7037

butterfly2937 wrote in post #18490796 (external link)
Did you see an increase in how quickly it switched between targets and your TS increased? At least on the 1DX II I can tell the difference in the time it takes to refocus if you move completely off the subject. You are correct it as no effect on initial AF speed at the start of AF. Is that what you mean?

Yes exactly. Initial focus when you press the shutter or BBF it makes no difference. After AF is achieved when moving the AF points from one target to another lowering or increasing TSA settings will make a difference.

I also liked this one. Use full zone AF and acquire a static target. Move the camera left to right. Try it wth low and high AF switching settings. You can see how the AF points react quicker with a higher setting.


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Phoenixkh
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Nov 07, 2017 11:10 |  #7038

I have my 1D IV set to -1 instead of -2 for the Tracking Sensitivity. I wonder if I should make the change. My photos seem to be coming out ok....


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Phoenixkh
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Nov 07, 2017 11:14 |  #7039

As far as the 7D2 was concerned, I followed what Jeff (Pondrader) was doing.... used Case 5 from the beginning. I think we changed the TS to one notch to the left/minus side... I just checked.... that's how Jeff set his up.

When my 7D2 was performing well for those first 10 months, that's where I kept it and it was brilliant.


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Nov 07, 2017 11:33 |  #7040

Phoenixkh wrote in post #18490854 (external link)
As far as the 7D2 was concerned, I followed what Jeff (Pondrader) was doing.... used Case 5 from the beginning. I think we changed the TS to one notch to the left/minus side... I just checked.... that's how Jeff set his up.

When my 7D2 was performing well for those first 10 months, that's where I kept it and it was brilliant.

My 7D2 and 5D4 are brilliant using any Case number. I purposely tested every case one day using my 7D2 for BIF and nailed them with every one. I posted results long ago. I decided to follow what Canon says as indicated by the part I copied from the AF guide.

https://photography-on-the.net …showthread.php?​p=18490729


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Phoenixkh
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Nov 07, 2017 11:37 |  #7041

digital paradise wrote in post #18490873 (external link)
My 7D2 and 5D4 are brilliant using any Case number. I purposely tested every case one day using my 7D2 for BIF and nailed them with every one. I posted results long ago. I decided to follow what Canon says as indicated by the part I copied from the AF guide.

https://photography-on-the.net …showthread.php?​p=18490729

Sadly, my 7D2 changed on me. But that's water under the bridge. My 1D IV worked so well, I picked up a second one as a back up. The used prices have come down quite a bit since I bought my first one, so I figured, why not?

Someday, I'll own a 1D X Mark 2... but not for a few years, I'd guess.


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Nov 07, 2017 11:53 |  #7042

Phoenixkh wrote in post #18490848 (external link)
I have my 1D IV set to -1 instead of -2 for the Tracking Sensitivity. I wonder if I should make the change. My photos seem to be coming out ok....

It won't hurt a thing. it will help to keep you subject in focus. Here my AF point is no where near the bird. They were before it swooped up. Like I at -2 you get about a second before the camera looks for something else to focus on and at 10 fps it makes a world of difference.


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Phoenixkh
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Nov 07, 2017 11:55 |  #7043

digital paradise wrote in post #18490892 (external link)
It won't hurt a thing. it will help to keep you subject in focus. Here my AF point is no where near the bird. They were before it swooped up. Like I at -2 you get about a second before the camera looks for something else to focus on and at 10 fps it makes a world of difference.

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./showthread.php?p=184​90892&i=i192687734
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I'll try it... like you said, it won't hurt anything


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Nov 07, 2017 11:57 |  #7044

Here are the other 2 that burst. It was fast and I tried to move faster to the right but didn't get up in time to re-acquire. I came around again. These are just screen shots. The real image of the last one here is sharp.


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Nov 07, 2017 19:27 |  #7045

Scrumhalf wrote in post #18490128 (external link)
Does -2/+2/+2 work for you, DP?

I've read a lot of blogs from wildlife photographers and there is pretty much universal consensus that TS should be -2. The other two settings vary, but +1/+1, +1/+2 or +2/+2 seem to be pretty commonly recommended.

I think I have my 7D2 set for -2/+1/+2.

I use -2, 2,2 but I have also trained myself to continually monitor if I fall off target with single point and pump BBF, rather than wait for reacquisition. New AF pumping acquisition is much faster than the TS -2 delay.




  
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Nov 07, 2017 19:37 |  #7046

Phoenixkh wrote in post #18490848 (external link)
I have my 1D IV set to -1 instead of -2 for the Tracking Sensitivity. I wonder if I should make the change. My photos seem to be coming out ok....

Kim,
I would say don't change it. You have already become aware with its characteristics. My guess is that I. Your gut you know when it will slipped off and reacquire, vs slip,off and maintain af long enough for you to get back in target. It becomes instinct once you get use to not. Why out yourself in a new situation that youwoukd need to build up proficiency.




  
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gschlact
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Nov 07, 2017 19:40 |  #7047

digital paradise wrote in post #18490892 (external link)
It won't hurt a thing. it will help to keep you subject in focus. Here my AF point is no where near the bird. They were before it swooped up. Like I at -2 you get about a second before the camera looks for something else to focus on and at 10 fps it makes a world of difference.

thumbnail
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./showthread.php?p=184​90892&i=i192687734
forum: Canon EOS Digital Cameras

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Hosted photo: posted by digital paradise in
./showthread.php?p=184​90892&i=i113820270
forum: Canon EOS Digital Cameras

What you demonstrate here is the reason, many people had trouble understanding why they were af issues. With smaller TS, often the red square was not indicative of where and when af was acquired in servo tracking mode.




  
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Lester ­ Wareham
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Nov 08, 2017 05:50 |  #7048

digital paradise wrote in post #18490761 (external link)
There were also some questions about TS -2 and +2 effecting initial AF acquisition speeds. I set the cam on a tripod and picked a good high contrast target. I defocused, then auto focused. I defocused it again and put pieces of tape on the lens so I would defocus the same amount between tests.

As I expected I did not see any difference between TS -2 and +2.

I have also tried this in the past with the same result.


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digital ­ paradise
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Nov 08, 2017 09:03 |  #7049

Lester Wareham wrote in post #18491612 (external link)
I have also tried this in the past with the same result.

Thanks for posting that. That is what I found and I was careful but I don't have the Hadron Collider around here so I can publish proven results :-)


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apersson850
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Nov 08, 2017 09:35 |  #7050

Somewhere in Canon's documentation they specifically point out that the initial acqusition isn't affected by this setting.


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7D Mark II - Focus Discussions
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