Originally posted by Kguru I'm missing something here; what is the disadvantage of leaving AF on half-pressed shutter button? Seems it can do most anything AF button can do, so for me it's more convenient than "fumbling" for the AF button
there are times when having the AF assigned to another button is better (for me). like when i need to use continuous-AF but if you try to recompose, the focus changes. so for times like those i use another button for AF and disable the AF in half-press.
what i do now is use half-press for AF and then assign the AF-button (k20d) to "disable AF" so once i am locked on the focus point i want, whether continuous AF or not, i have the option to leave the focus as is. it's really useful for suddenly wanting to MF, i know that SDM can override AF but you can do so AFTER the AF locks, so that's still a moment, while just holding the AF button at the back will just disable AF and go straight into MF mode
much faster than having to turn the AF switch in front!