Prefocus with shutter button.

[iprior]

Hi I have a Sony NEX3....Can someone confirm that I can lock focus  with the shutter button ( half pressed) then re compose picture?....does this work in manual mode? Thanks.

[Portmixus]

Yes you can do that with every camera as long as you do not use continuous autofocus (AF-C). In AF-S (single) this is no problem.

Just try it 

[iprior]

Hi...many thanks for your help. When I try to prefocus ...depending on the mode...I can see a change in the viewfinder as it changes..but not in manual...how can I confirm thes setting is working?

[Portmixus]

I'm not sure I understand your question. Whether you're in P,A,S or M (manual), the half-pressed shutter button behaves the same.

Just make sure you are in AF-S.

If you are referring to "manual focus", half pressing the shutter button will do nothing (as you have to turn the focusingring yourself).