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Thread started 02 Jul 2014 (Wednesday) 01:39
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5diii - AF point used in playback

 
a_dee
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Jul 02, 2014 01:39 |  #1

Been mucking around with this option the last couple days and notice that when the AF point is enabled in playback, sometimes it shows, and sometimes its absent. Now I just can't remember whether it is possibly related to one-shot or servo mode.


6D . SL1
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Tom ­ Reichner
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Jul 02, 2014 01:54 |  #2

If it works like it does on my bodies, it has to do with focus/recompose vs. having the red box "locked on" when taking the shot.


"Your" and "you're" are different words with completely different meanings - please use the correct one.
"They're", "their", and "there" are different words with completely different meanings - please use the correct one.
"Fare" and "fair" are different words with completely different meanings - please use the correct one. The proper expression is "moot point", NOT "mute point".

  
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a_dee
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Jul 02, 2014 01:55 |  #3

hmmm interesting, will keep that in mind. I always thought the camera didn't know whether you had recomposed.


6D . SL1
EF-S 24mm f/2.8 . 40mm f/2.8 . 85mm f/1.8 . 70-200mm f/4L IS
Speedlite 430EX . Kenko 1.4x Pro 300DG . Kenko Extension Tube Set
Gone for Now: 5D3 . Rokinon 14mm f/2.8 . 20mm f/2.8 . 35mm f/1.4L

  
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Tom ­ Reichner
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Jul 02, 2014 01:59 |  #4

a_dee wrote in post #17006644 (external link)
hmmm interesting, will keep that in mind. I always thought the camera didn't know whether you had recomposed.

That's possible. But I only use back button focus with AI servo - so when I do focus/recompose, it doesn't show the red box in playback, and when I do not focus/recompose, it does show the red box. So it could be based on whether I am pressing the back button when firing off the shot, or not, which, for the way I shoot, would happen to coincide with focusing/recomposing.


"Your" and "you're" are different words with completely different meanings - please use the correct one.
"They're", "their", and "there" are different words with completely different meanings - please use the correct one.
"Fare" and "fair" are different words with completely different meanings - please use the correct one. The proper expression is "moot point", NOT "mute point".

  
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a_dee
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Jul 02, 2014 02:00 |  #5

thanks for the tips; will observe some more in my next shootings.


6D . SL1
EF-S 24mm f/2.8 . 40mm f/2.8 . 85mm f/1.8 . 70-200mm f/4L IS
Speedlite 430EX . Kenko 1.4x Pro 300DG . Kenko Extension Tube Set
Gone for Now: 5D3 . Rokinon 14mm f/2.8 . 20mm f/2.8 . 35mm f/1.4L

  
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tonylong
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Jul 02, 2014 02:00 |  #6

There will be a difference between how it behaves in One Shot AF and AI Servo AF, for sure, since One Shot AF will "signal" correct focus/lock, whereas AI Servo doesn't "lock" focus, but tracks moving focus points!


Tony
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rrblint
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Jul 02, 2014 02:03 as a reply to  @ Tom Reichner's post |  #7

Press and hold the button and the point shows up in red, press and release and the point won't show up in red.


Mark

  
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CRCchemist
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Jul 02, 2014 02:04 |  #8

Tom Reichner wrote in post #17006654 (external link)
That's possible. But I only use back button focus with AI servo - so when I do focus/recompose, it doesn't show the red box in playback, and when I do not focus/recompose, it does show the red box. So it could be based on whether I am pressing the back button when firing off the shot, or not, which, for the way I shoot, would happen to coincide with focusing/recomposing.

Tom is exactly correct.

The red box shows if the autofocus is currently engaged at the moment the shot is taken.

If you use back button focus, then it may or may not show, depending on whether it was pressed at the same time as the shutter.

If you use shutter button focus, it will always show up, because the focus button and the shutter button are one and the same.




  
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a_dee
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Jul 02, 2014 02:12 |  #9

sounds good guys, I use back button focus so it must be as you have described, whether or not my thumb is down when I fire the shutter.


6D . SL1
EF-S 24mm f/2.8 . 40mm f/2.8 . 85mm f/1.8 . 70-200mm f/4L IS
Speedlite 430EX . Kenko 1.4x Pro 300DG . Kenko Extension Tube Set
Gone for Now: 5D3 . Rokinon 14mm f/2.8 . 20mm f/2.8 . 35mm f/1.4L

  
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5diii - AF point used in playback
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