A6300 - Does continuous focussing work with lower openings than f11?

[mg10]

Today, during a photo session with my a6300 I have verified that when I am in C-AF mode and close diaphragm below f11 (f13 onwards), when trying to focus, the image oscillates for a few seconds without getting focused until after that lapse. The curious thing is that the focus box turns green instantly, but the image is focused and unfocused for several seconds. I think that from f13 inclusive, phase detection mode is disabled and only CDAF mode remains. I do not know if this implies that at openings lower than f11 continuous focus mode can not be used. I have not seen any article about it. This behavior, I have tested with lenses 16-50 and 50 1.8. Can you check if the same thing happens to you?

B. R.

[Pieter]

When closing down beyond a minimum aperture, the camera indeed switches to contrast AF. Have a look at this thread. Not about the a6300 but the answer to your question is similar.

https://www.dpreview.com/forums/thread/4135347

[mg10]

53 minutes ago, Pieter said:

When closing down beyond a minimum aperture, the camera indeed switches to contrast AF. Have a look at this thread. Not about the a6300 but the answer to your question is similar.

https://www.dpreview.com/forums/thread/4135347

Thanks for your answer. It is true that in case of disabling live view, the camera focuses faster with small apertures, but the behavior that I mentioned is repeated. In AF-C, the image fluctuates for 3 or 4 seconds, focusing and softly defocusing until it stops, however, the focus frame turns green from the beginning. 

[mg10]

Well, finally I could test it in another camera and same behavior. So, AF-C doesn't work with smaller apertures than f11. Sony could implement a warning or limitation in firmware to avoid this setting, I think.