franzshire Posted June 28, 2015 Share #1 Posted June 28, 2015 Advertisement (gone after registration) Can the thumb button be used as an af-on button? I am a big fan of using back-button focus and not knowing if I can do this is one of the things that kept me from buying first day. I have heard one person say it does, but the review don't mention it. Thanks. Link to post Share on other sites More sharing options...
Advertisement Posted June 28, 2015 Posted June 28, 2015 Hi franzshire, Take a look here Back-Button Focus. I'm sure you'll find what you were looking for!
alee Posted June 28, 2015 Share #2 Posted June 28, 2015 Yes... I just switched mine to AEL and it will work as an AF button. Link to post Share on other sites More sharing options...
esp Posted July 31, 2015 Share #3 Posted July 31, 2015 I use back button focus on my DSLR. For me it makes sense to separate metering from focusing. But on my Q it is not possible to do the metering first (on an area that you want to have right exposure) and then, with the shutter half pressed, compose and focus. The back button focus must be set before you use the shutter button to measure, right? I think the focus in most situations should be done as late as possible so you don't move the camera after focusing. I find that back button focus is not a very good option on the Q, also because the button is to small and you may need it for other options (such as 28/35/50 frame selection). Link to post Share on other sites More sharing options...
ctj20 Posted March 29, 2016 Share #4 Posted March 29, 2016 Leica Q arrived today and my back button focus doesn't seem to be working - tried all options in the menu 'Zoom/Lock-Button' set it to AEL and also AEL/AFL and no joy! the shutter button just doesn't seem to de-couple - Is mine defective or am I missing something? any help greatly appreciated Link to post Share on other sites More sharing options...
ctj20 Posted March 29, 2016 Share #5 Posted March 29, 2016 No sooner had I posted this and then it just started working - can't tell you why! it just happened - All there best! Link to post Share on other sites More sharing options...
Keith (M) Posted March 29, 2016 Share #6 Posted March 29, 2016 Discussed in an earlier thread... Link to post Share on other sites More sharing options...
Herve5 Posted March 29, 2016 Share #7 Posted March 29, 2016 Advertisement (gone after registration) I use back button focus on my DSLR. For me it makes sense to separate metering from focusing. But on my Q it is not possible to do the metering first (on an area that you want to have right exposure) and then, with the shutter half pressed, compose and focus. The back button focus must be set before you use the shutter button to measure, right? You can set the back button (thumb) to trigger various functions, among others exposure lock or focus lock. So indeed you can choose to do the metering first (having set it to central point metering) : aim the zone you want to be correctly exposed, press thumb button (set to AE-L), then aim your subject, half-press the shutter to focus, then (possibly) finalize framing and go. As already mentioned in this very forum IIRC, the best setup for this is - Fn set to cycle between the 3 metering systems, allowing you to quickly jump to central point metering - thumb button set to AE-L. After this, if you don't need the above adjustments for the 'general picture', just point and shot, the shutter will still do both AE and AF... Link to post Share on other sites More sharing options...
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