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How to achieve AFc mode ?


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Hello everybody,

 

I have forgotten how to get to achieve AFc mode.

 

I understand that I have to select 'C' under Drive Mode, but I've been tapping Drive Mode to no effect.

 

After going to Focus Mode and selecting AFc I am only able to take single shots.

 

Can't figure it out, even after going to the wunderbar(!) manual

 

Help.

 

John

 

 

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I think i read somewhere that one of them is meant to limit the travel of the auto focus, other manufacturers use the limit switch on the lens. I've notice the number of focus options seems to vary according the the lens fitted.

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In AFs mode, the camera focuses when you half press the shutter release and stops as soon as it has achieved focus (or given up and displayed a red indicator).

 

In AFc mode, the camera is continuously focusing whether you are pressing  the shutter release or not. Try to point the camera to different  objects in a quiet environment and you'll hear the motor singing its song. Of course this has a negative impact on battery life, but could make the camera more responsive because it has already pre-focused before you start to press the shutter release. At the time you half press the release, the focus is locked. This is no tracking: it will not follow a moving target.

 

Tele lenses like the 55-135 bring with them a long range focus option noted with an infinity symbol. It is available for both AFs and AFc. It simply reduces the time needed to achieve focus by eliminating the close range area. It is also a good option when shooting through a window because it prevents the camera from focusing on something sticking to the window's pane like rain drops or dust. 

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Jean-Paul, I have 2 questions:

 

1- For AFc,  when the little square is on the object you want to focus, you press half way on the release;  then, you can remove your finger and re-frame. Your object stay in focus?

2- Is there any way to tracking the fous for moving objects with T?

 

Merci beaucoup, cher ami,

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Hi Louis,

 

1-  The focus stays locked only while you press on the release. So you have to keep your finger on it while re-framing.

 

2- Not that I know of. Altough AFc can be an approximation of it if you press the release all the way down, not stopping halfway because it has hopefuly followed the subject all the time.

 

 

All that from a guy who prefers MF mode because:

-  spending years with M bodies imprints some habits 

-  you don't have to argue with your camera, trying to make it understand where the hell you want to focus

-  and finally it saves a lot of headaches

 

 

Jean-Pierre

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Hi Louis,

 

 

All that from a guy who prefers MF mode because:

-  spending years with M bodies imprints some habits 

-  you don't have to argue with your camera, trying to make it understand where the hell you want to focus

-  and finally it saves a lot of headaches

 

 

Jean-Pierre

Jean-Pierre,

 

Well said - I agree with you on this. I spent years with manual focus cameras, and I feel more comfortable shooting manual than with auto focus. Of course, this can be a bit slower than with auto focus, but my style of shooting does not need to be rapid fire. In fact slowing the whole operation down definitely helps my composition and focus accuracy.

Rick

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