dieselnutjob
Senior Member
I just upgraded from a D3100 to a D750 (about four weeks ago).
The D3100 rarely came out of Auto mode, but now my daughter is doing wonderful things with it so I got to upgrade.
One of the things I saw in Tony Northrup's wonderful tutorial (https://www.youtube.com/watch?v=GmT4wVNTTjE) was Back Button Focus.
Having tried it I kind of get it, especially for focus and recompose, but I'm not sure that I'm 100% all in on this.
After enabling it I then (later on) found myself forgetting to focus.
So then I thought, is there an easy way to enable Back Button Focus (BBF) only when I want it?
The only answer I found is to program it into one of the U1/U2 settings. So for example I can put the camera in P mode, set BBF off and save to U1, then set it on and save to U2.
Now U1 is P without BBF and U2 is P with BBF. All of the others (Auto, P, S, A, M) also now BBF on because that was the last one before saving it. If I had set BBF on and saved it then BBF off and saved it then I think that would make BBF off the default, is that right?
Anyway this seems a little clunky because now suppose I want to reassign the record button to ISO, I have to now save that to U1 and U2 as well which "overwrites" the BBF setting in one of them, so I kind of have to do the BBF on in U1 and off in U2 again.
Is there a cleverer way to do this?
I guess I want an easy way to temporarily use BBF just when I want it? and maybe I want that way to work in all of the modes (Auto, P, S, A and M), and really I suppose I would want continuous focus on as well, and maybe go back to single focus when BBF is deselected.
The D3100 rarely came out of Auto mode, but now my daughter is doing wonderful things with it so I got to upgrade.
One of the things I saw in Tony Northrup's wonderful tutorial (https://www.youtube.com/watch?v=GmT4wVNTTjE) was Back Button Focus.
Having tried it I kind of get it, especially for focus and recompose, but I'm not sure that I'm 100% all in on this.
After enabling it I then (later on) found myself forgetting to focus.
So then I thought, is there an easy way to enable Back Button Focus (BBF) only when I want it?
The only answer I found is to program it into one of the U1/U2 settings. So for example I can put the camera in P mode, set BBF off and save to U1, then set it on and save to U2.
Now U1 is P without BBF and U2 is P with BBF. All of the others (Auto, P, S, A, M) also now BBF on because that was the last one before saving it. If I had set BBF on and saved it then BBF off and saved it then I think that would make BBF off the default, is that right?
Anyway this seems a little clunky because now suppose I want to reassign the record button to ISO, I have to now save that to U1 and U2 as well which "overwrites" the BBF setting in one of them, so I kind of have to do the BBF on in U1 and off in U2 again.
Is there a cleverer way to do this?
I guess I want an easy way to temporarily use BBF just when I want it? and maybe I want that way to work in all of the modes (Auto, P, S, A and M), and really I suppose I would want continuous focus on as well, and maybe go back to single focus when BBF is deselected.