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In menu settings page 1:

Focusing > Touch AF > (set to) Touch AF (you have it set to Touch AF + Release)

Focusing > Touch AF in EVF > (set to) AF Quick Setting only

I have the EVF-LCD set to EVF extended so the LCD is off for picture taking. With the settings above, the touch sensitive LCD is still active though not illuminated and a double tap on the LCD will recenter the focus point while looking through the EVF. It will not focus or activate the shutter when touched with my finger, or my nose. 

 

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12 hours ago, Alan Friedman said:

In menu settings page 1:

Focusing > Touch AF > (set to) Touch AF (you have it set to Touch AF + Release)

Focusing > Touch AF in EVF > (set to) AF Quick Setting only

I have the EVF-LCD set to EVF extended so the LCD is off for picture taking. With the settings above, the touch sensitive LCD is still active though not illuminated and a double tap on the LCD will recenter the focus point while looking through the EVF. It will not focus or activate the shutter when touched with my finger, or my nose. 

 

Thank you, so there is no way of having 'Touch AF + Release' and re-centre the AF target quickly.

Edited by Dave in Wales
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For obvious reason it is not possible. How could the Q2 distinguish the two ? 
 

However you can use your D-pad to manually move the target back to center. It won’t be as fast as double tap. 
 

Personally I never use tap to focus + shoot. 

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Is back button focussing not possible on a q2? It is on a q. If so it’s easier to leave the focus point in the middle of the screen, point the camera at what you want to focus on, focus, recompose then press the shutter. It’s much quicker. If I have misunderstood your post apologies in advance

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8 hours ago, Dave in Wales said:

Thank you, so there is no way of having 'Touch AF + Release' and re-centre the AF target quickly.

The settings I outlined above should do just that - recenter the target for autofocus, without initiating autofocus or activating the shutter. If you want to take a picture touching the LCD, then set it to Touch AF + Release.

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15 hours ago, Alan Friedman said:

The settings I outlined above should do just that - recenter the target for autofocus, without initiating autofocus or activating the shutter. If you want to take a picture touching the LCD, then set it to Touch AF + Release.

Thanks again I'll give it another try.

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18 hours ago, antigallican said:

Is back button focussing not possible on a q2? It is on a q. If so it’s easier to leave the focus point in the middle of the screen, point the camera at what you want to focus on, focus, recompose then press the shutter. It’s much quicker. If I have misunderstood your post apologies in advance

Don't do that, it is bad habits, because of focus shift.

Once in a while I talked to a manager from Leica France. it told me that Leica will never ever add a fixed central AF target because of that. 

They want to avoid focus shift at all cost, stating that focusing in the center then recompose is a bad habit from analog days. 

With digital, focus shift may ruined a photo. 

It is kind of a silent war from Leica against that habit. Leica will not budge and customers will continue to ask for it. Who will win ? 

Leica could have implemented the Hasselblad solution : a positioning sensor that shift the focus along with recomposition. Very neat. Maybe costly

 

So just try to put the focus point on the correct spot. It will be more accurate. 

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7 hours ago, nicci78 said:

Don't do that, it is bad habits, because of focus shift.

Once in a while I talked to a manager from Leica France. it told me that Leica will never ever add a fixed central AF target because of that. 

They want to avoid focus shift at all cost, stating that focusing in the center then recompose is a bad habit from analog days. 

With digital, focus shift may ruined a photo. 

It is kind of a silent war from Leica against that habit. Leica will not budge and customers will continue to ask for it. Who will win ? 

Leica could have implemented the Hasselblad solution : a positioning sensor that shift the focus along with recomposition. Very neat. Maybe costly

 

So just try to put the focus point on the correct spot. It will be more accurate. 

Fascinating. Thanks Nicci.  It certainly does date from analog days but I'm surprised they see it as a bad habit, or that it causes focus shift. I'm not even sure what focus shift means in this scenario. I've had it happen  if I focus, then move the camera to horizontal, then up again. My beloved SL and 24-90 does this. But it didn't take long to train myself not to focus then point the camera down. Good luck!

 

ps Later - on reflection, it's how I always focus my M9. I need to get something contrasty to be sure I've got the focus correct, then I recompose to adjust the framing. I don't see how else I'd use it. Of course an M9 isn't an autofocus camera, but I'm sure that's where the technique comes from.

Edited by antigallican
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7 hours ago, nicci78 said:

Don't do that, it is bad habits, because of focus shift.

Once in a while I talked to a manager from Leica France. it told me that Leica will never ever add a fixed central AF target because of that. 

They want to avoid focus shift at all cost, stating that focusing in the center then recompose is a bad habit from analog days. 

With digital, focus shift may ruined a photo. 

It is kind of a silent war from Leica against that habit. Leica will not budge and customers will continue to ask for it. Who will win ? 

Leica could have implemented the Hasselblad solution : a positioning sensor that shift the focus along with recomposition. Very neat. Maybe costly

 

So just try to put the focus point on the correct spot. It will be more accurate. 

I agree with your last sentence... in a situation where the subject is static, that would be ideal. 

But let's not confuse focus shift - a problem where some lenses show a change in focal plane at different apertures - with this scenario, where focus/compose can possibly change the distance between subject and camera by a large enough margin to result in a change of subject sharpness. The latter scenario could be a problem if the distance to the subject is close, the aperture is wide and the movement is significant. It is less likely to be a problem as distance to the subject increases and/or the lens is stopped down. 

That said, Leica's flagship rangefinder cameras are limited to a fixed central region of focus. Focus and compose is the traditional method of operation with these cameras (really the only way short of using them with an EVF).

Edited by Alan Friedman
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  • 1 year later...
  • 5 months later...
On 5/11/2024 at 7:04 AM, Jenny2811 said:

Hello all,

 

New Leica Q3. I have touch AF on but nothing happens by touching the screen. Is there anything else i need to do?

When u see an object looking at the lcd, that object will be in focus. 
‘Switch around touching different object on the lcd, u will see the focus changes object to object. 

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