Q2 shutter half-press

[timplog]

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hey folks, wondering if both the focus, and the exposure, are locked when one half-presses the Q2 shutter button during the "lock and recompose" method. 

seems like they must

noobie

appreciate your time and hope you're all very well

 

[Leica Guy]

Tim,

I could answer your question,  but instead I suggest a better method is to run a little experiment and find the answer and learn yourself. 
Poimt the Q2 at something close and in normal light then had-press the shutter button. Now, keeping your finger half-pressing the shutter re-aim the camera at something further away that’s brightly lit. A lamp would be an idea. Push the shutter all the way. If the image is out of focus and very bright you have your answer. Yes, it’s locked with a half press. 
 

I run little experiments all the time trying to figure things out. Sometimes I ask for help to, but not very often. 
 

Good luck. The Q2 is a fantastic camera. 

Dan
 

[timplog]

thanks for your thoughtful reply Dan, and I take your point re figuring things out 'in house' whenever feasible, it does help to keep life interesting. 

I could though imagine situations where it happened that the exposure value at the locked focus location, would coincidently be the same EV at the new, recomposed reading and so not prove one way or the other whether the EV was already locked, or not. 

anyway seems the logic would be for the programing to assume your point of focus (lock) would be the point of interest and so also lock the exposure for that. 

this is a great forum and certainly a great camera. 

and thanks again Dan, great folks!

[Alain88]

Well, sadly, it does. They improved the behaviour of the focus-lock button but it remains far from my expectations...

The behaviour of the back button is: press - camera aquire focus and locked it -> press again - the focus unlock

Once focus is locked, the halfpressed shutter just measure the exposure. If focus isn't locked, the halfpressed shutter will also autofocus.

The worst situation is when you set to AFC and focus lock on the rear button. As the focus WILL LOCK with the back button, you don't have the continuous focus any more. The only way you get AFC is to use the halfpressed shutter to autofocus. So this combination makes no sens.

I would prefere to have the following back button behaviour: press - camera aquire focus -> press again - aquire focus again. So the camera stop aquiring focus if you released the button (case AFC) or get green/red cross (case AFS). This would make a lot more sens when using AFC and back button focusing. And halfpressing the shutter should have no effect on the autofocus (No matter if the focus has not been aquired/locked before)!

It would also be great to be able to set less autofocus points across the frame, 'cause moving the cross through the frame is not fun at all. Give me just 9, or 5, I'll recompose from there...

[Jfl132]

Folks, with my Q, I manually focus, adjust field of view to get what I think as appropriate exposure. Half press button, then recompose. Seems to work for me. 

[timplog]

.....and Dan i do note your suggestion of using a bright lamp in the recompose frame to test-of course 99% you are quite right. thanks again

[marchyman]

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2 hours ago, Jfl132 said:

Folks, with my Q, I manually focus, adjust field of view to get what I think as appropriate exposure. Half press button, then recompose. Seems to work for me. 

That is also how I mostly work with my Q.  If not using manual focus I may use back button focusing, but I understand that the Q2 is different compared to the Q with the way the back button is handled.

[Leica Guy]

I exclusively use BBF on my DSLR’s and now mirrorless Canon R5. Leave the camera in Servo mode and as long as the AF-ON button is pushed it’s focusing. Stop pushing the button locks the focus. 

I find the button on the back of the Q2 awkward at best so a long time ago I gave up on BBF for it. I also find it’s less important with wide-angle lenses like the 28mm Q2. 

Your mileage may vary. 

[timplog]

same here with my Canon 1ds3 it is so very natural to set focus with the back button…

c’mon Leica-catch up won’t cha?

cheers

[Alain88]

I think that once they fixed the bug with this button (I don't quit remember what it was) they thought the functionnality was fine, unless it's not working as it should and it's not ergonomic at all!

Maybe they thought: Autofokus ist für uns alle Neuland. (Does anybody have the reference?)

Edited August 23, 2022 by Alain88