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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 10 Mar 2011 (Thursday) 00:19
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back button focus, why?

 
ppucci
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Mar 10, 2011 17:48 |  #31

I have started using it a while ago and I love it too. Just feel stupid when I forget it is set and keep wondering why the camera isn't focusing... still need to get used to it, but it is definitely a lot better than on the shutter button.


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Stuart ­ Leslie
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Mar 10, 2011 18:19 |  #32

Made the switch about a year ago and I don't even think about it any more and my shots are so much more accurately focused. Shooting Soccer, wildlife, portraits, landscapes, street. One of the rare times I would recommend EVERYONE make the switch and spend the time to get used to it. You won't regret.


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itzcryptic
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Mar 10, 2011 18:22 |  #33

I switched it once, then kept forgetting I had it setup that way. I switched it back to the half-press and tried it again not too long ago. Since I've been taking more pictures recently, now I actually remember that it's set to back button focus.




  
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tonylong
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Mar 10, 2011 20:13 |  #34

For those who are interested in more facts and discussion, scroll down to the bottom of this page and check out the Similar Threads section -- the thread title triggered a forum mini-search that yielded a lot of good results!


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TeamSpeed
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Mar 10, 2011 20:26 |  #35

It is the 2nd option I set on every single camera I buy, the first being shutting off the beep.

I love this feature, I can focus on any part of the scenery beforehand, then recompose, remeter, etc and shoot something else. I could never have focusing on the shutter button again after having done this. :)

Imagine shooting snowboarders... Focus on the end of a ramp, meter for the snow, and then just wait, when the snowboard hits air off the ramp, you snap the shot. If you have focus on the shutter button, you could very well end up focusing on the trees, etc.


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soonerce
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Mar 10, 2011 22:53 as a reply to  @ TeamSpeed's post |  #36

It's amazing, I try to turn every Canon DSLR user I know onto it. And on the 7D you can assign the * button to focus on the active AF point and the AF-ON button to focus on the user defined registered AF point (or vice versa). That way in the heat of the action you can quickly change which AF point you focus to so you don't have to focus and recompose. The 7D is so customizable...totally impressed so far.


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Overkill-F1
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Mar 10, 2011 23:27 |  #37

TeamSpeed wrote in post #11998092 (external link)
It is the 2nd option I set on every single camera I buy, the first being shutting off the beep.

I couldn't agree more!
I love back button focus, really dislike the bleeping beep!
...Terry


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itzcryptic
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Mar 10, 2011 23:31 |  #38

Overkill-F1 wrote in post #11999117 (external link)
I couldn't agree more!
I love back button focus, really dislike the bleeping beep!
...Terry

Well, the first thing I would do on a new body would be to disable shooting without a card. Then all that other stuff.




  
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maximus96
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Mar 10, 2011 23:41 |  #39

soonerce wrote in post #11998974 (external link)
It's amazing, I try to turn every Canon DSLR user I know onto it. And on the 7D you can assign the * button to focus on the active AF point and the AF-ON button to focus on the user defined registered AF point (or vice versa). That way in the heat of the action you can quickly change which AF point you focus to so you don't have to focus and recompose. The 7D is so customizable...totally impressed so far.

really? i never knew it can do that. how can i set mine like that?


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apersson850
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Mar 11, 2011 08:41 |  #40

maximus96 wrote in post #11999176 (external link)
really? i never knew it can do that. how can i set mine like that?

Once the home points are defined, you set to use them in C.Fn IV-1.


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E ­ James ­ P
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Mar 11, 2011 10:17 |  #41

For me it feels more natural keeping the focus separate from the shutter button since I had learn to do this coming from Canon FD series of film cameras.


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mtimber
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Mar 11, 2011 11:31 |  #42

apersson850 wrote in post #12000726 (external link)
Once the home points are defined, you set to use them in C.Fn IV-1.

Can you expand on this, I do not quite understand what you are saying.


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stevemacko
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Mar 11, 2011 11:42 |  #43

Those of us with older bodies don't have the AF-ON button... 30D here.

jcpoulin wrote in post #11995555 (external link)
What's the difference from using the AF-ON button vs the * button for al-servo use and tracking?


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soonerce
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Mar 11, 2011 12:04 |  #44

mtimber wrote in post #12001609 (external link)
Can you expand on this, I do not quite understand what you are saying.

This is how I set my camera up to focus on a different AF point with a different button:

1. Set C.Fn III-12 Orientation linked AF point to 1 (not sure this is required)
2. Hit the AF Point Selection button and select the AF point that you want to put in memory (for me this is the top AF point, but can be any of the 19)
3. Hold the AF Point Selection button and the LCD panel illumination button (lamp icon) down at the same time for approximately 3 seconds - it should stop blinking when it is memorized
4. Turn the camera horizontal and repeat this process to memorize the AF points you want to use with all orientations of the camera
5. After you have the points memorized, you can move the AF point back to where you normally use it (for me this is the center)
6. Next you need to customize your * and AF-ON buttons, do this in C.Fn IV-1 Custom Controls
7. Set the AF-ON button to "Metering and AF Start" then hit the Info button and select the graphic with the HP
8. Set the * button to "Metering and AF Start" then hit the info button and make sure it is set with the RP icon (? the option to the left, I don't have my camera with me)

Now when you hit the AF-ON button it will focus on the point you registered and when you hit the * button it will focus on whatever point you currently have selected.

More on this can be found in the manual on page 219. Hope this helps.


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apersson850
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Mar 12, 2011 10:09 as a reply to  @ soonerce's post |  #45

No, you don't need orientation linked AF point selection for Home Points to work, but if you do enable it, you are allowed to store different home points for different orientations.


Anders

  
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back button focus, why?
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