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Focus Touch-AF and Shutter button separation

EMLEICA
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Belle123

Belle123

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Think I can answer your question, if I understand it. Am assuming you know the shutter button has a half position where doesn't release the shutter and just focuses? The half position triggers the focus and you can hold it down and move the camera view to your hearts content and it will stay in that focus position even though what you focused on originally might now be out of focus or even out of view. But, no, the camera will always refocus if in autofocus mode once you go from not touching the shutter button to either half down or all the way down which triggers the shutter. Does that answer your question?

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EMLEICA

EMLEICA

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Think I can answer your question, if I understand it. Am assuming you know the shutter button has a half position where doesn't release the shutter and just focuses? The half position triggers the focus and you can hold it down and move the camera view to your hearts content and it will stay in that focus position even though what you focused on originally might now be out of focus or even out of view. But, no, the camera will always refocus if in autofocus mode once you go from not touching the shutter button to either half down or all the way down which triggers the shutter. Does that answer your question?

 

 

 

In the first place I wish to thank you for your reply.

What I would like to obtain is something similar to "back-focusing", in other words, beeing able to focus with the "Touch-AF" on the LCD and after that, simply press the shutter button to take the photo without the focusing of the "half position trigger". Hope I made it more clearly.

Is that possible or there is no way to stop focus when pressing the shutter button ?

 

Thanks again for any help.

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Belle123

Belle123

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In the first place I wish to thank you for your reply.

What I would like to obtain is something similar to "back-focusing", in other words, beeing able to focus with the "Touch-AF" on the LCD and after that, simply press the shutter button to take the photo without the focusing of the "half position trigger". Hope I made it more clearly.

Is that possible or there is no way to stop focus when pressing the shutter button ?

 

Thanks again for any help.

Hmmm. I don't think possible. Haven't found any way around it.

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euston

euston

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The Touch AF + Release setting of the auto-focus mode seems to do what you want, if I have understood you correctly. My apologies if I haven't. In this mode you touch the screen to focus and the camera operates the shutter. You don't need to touch the shutter release button at all.

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EMLEICA

EMLEICA

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The Touch AF + Release setting of the auto-focus mode seems to do what you want, if I have understood you correctly. My apologies if I haven't. In this mode you touch the screen to focus and the camera operates the shutter. You don't need to touch the shutter release button at all.

 

 

Thanks for your comment but that's not exactly what I want.

I would like to focus with the Touch-AF (at one specific location on the image) and, after that, use the shutter release to "measure the scene" (correct exposure) and take the shot at the right moment (without any refocusing).

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Jkulin

Jkulin

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The only way I can see to do this is use AF, then once focused switch to manual focus without touching the shutter or lens and mess around with the exposure/composition and take the shot.

 

Long winded and IMHO totally unnecessary, either shoot manual or shoot AF by a half press to lock the focus.

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EMLEICA

EMLEICA

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The only way I can see to do this is use AF, then once focused switch to manual focus without touching the shutter or lens and mess around with the exposure/composition and take the shot.

 

Long winded and IMHO totally unnecessary, either shoot manual or shoot AF by a half press to lock the focus.

 

 

Thanks for the comment but IMHO this is something, once in a while, too good to be wasted.

My Leica-Q has this function and I love that "back-focusing" option.

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EMLEICA

EMLEICA

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Sorry but that doesn't make any sense as all images require separate focusing from exposure. In fact every single time I pressure the shutter a different exposure and focus point takes place.

 

 

Maybe we are talking about different things. My English is not my native language...

Many times you just may want to focus on one zone and get exposure from another diferent zone of the scene (highlights issues)...

But dont worry... just keep doing your way, and I will keep waiting from a firmware upgrade...

Thanks for your time.

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Jkulin

Jkulin

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Maybe we are talking about different things. My English is not my native language...

Many times you just may want to focus on one zone and get exposure from another diferent zone of the scene (highlights issues)...

But dont worry... just keep doing your way, and I will keep waiting from a firmware upgrade...

Thanks for your time.

 

Your English is excellent so please don't worry about that, if English is not your native language then you can be very proud of your ability..

 

In the old'un days I use to use my Lunasix F and take a light reading from a different area, especially when taking high contrast images such as snow, weddings or landscape photos and then would focus on the area of my final image.

 

Maybe you could try something similar by taking a reading first and then focus on the area you want, I know it is the chicken before the egg but working in reverse might achieve your aim.

 

Good Luck.

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euston

euston

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Maybe we are talking about different things. My English is not my native language...

Many times you just may want to focus on one zone and get exposure from another diferent zone of the scene (highlights issues)...

But dont worry... just keep doing your way, and I will keep waiting from a firmware upgrade...

Thanks for your time.

 

I think I see the problem now. Because focus and exposure are locked together when using autofocus, you can’t focus on one spot and meter off another, which is something I find myself wanting to do quite often. Some cameras have a button that will lock the metering so that it doesn’t change when you press the shutter button to focus and shoot. As far as I know, you can’t do that on a T.

 

The only solution I know of is to use manual focus. Depressing the shutter halfway will fix the metering to where you want it but you can change the focus independently. Also, with native T lenses it is possible to adjust the focus manually even when using autofocus. Half press the shutter button to fix metering and then, keeping it pressed, adjust the focus to precisely where you want it.

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EMLEICA

EMLEICA

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I think I see the problem now. Because focus and exposure are locked together when using autofocus, you can’t focus on one spot and meter off another, which is something I find myself wanting to do quite often. Some cameras have a button that will lock the metering so that it doesn’t change when you press the shutter button to focus and shoot. As far as I know, you can’t do that on a T.

 

The only solution I know of is to use manual focus. Depressing the shutter halfway will fix the metering to where you want it but you can change the focus independently. Also, with native T lenses it is possible to adjust the focus manually even when using autofocus. Half press the shutter button to fix metering and then, keeping it pressed, adjust the focus to precisely where you want it.

 

 

 

Thank you so much for your comment. You made it more clear and exactly the way I was trying to explain.

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JPP1

JPP1

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when using autofocus, you can’t focus on one spot and meter off another,

 

Yes, you can because you can move the AF target anywhere on the screen/EVF. So the focus is on one point and the exposure in the center.

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