BackdoorArts
Senior Member
I'd been experiencing a rather strange phenomenon with my D750 (I'm putting together a review, and this will be in there) that I believe warrants separate mention.
I use AF-S mode a lot. It comes from my days shooting film where I'd focus and recompose, and while I've recently tried to really break myself of the habit and use focus points, I still do this a lot with static subjects. This hasn't been an issue for me until I got the D750. Let me explain.
I've changed all my cameras to back-button focus, which means that the AE-L/AF-L button is now set to AF-ON. This has never stopped me from focusing on a center point, reframe and fire. But I noticed very quickly that when I did this with the D750 it wouldn't fire. I had my AF-S Priority Select menu option set to Focus (vs. Release), just like every other camera I own, but when I'd reframe the shot wouldn't fire. When I was out today I decided to just not figure it out, changed the setting to Release and shoot away - thankfully everything worked out fine. So, when I got home, I started investigating why this was happening.
When I use AF-S, I use single point, and every camera (up to now) gives me a choice of a single point or an Auto selection. With the D750, however, when I choose AF-S mode I have a choice of modes (my word - I am without the manual as I type) that it operates in - Auto, S(ingle point) and Group. I assumed that Single Point would be appropriate as it is the only one that gives you a single AF point in the viewfinder. However, if you lock focus in on that point and then recompose, if the subject under that now-recomposed point isn't in focus the camera will not fire (with the AF-S Priority Select set to Focus)!! I have to tell you, it was making me crazy today. I verified this at home - choose a focus point, engage autofocus, recompose and attempt to shoot and it will not fire. But, if you change the mode to Group, which now surrounds the point with add'l focal points, it doesn't seem to matter how much or far you recompose, it will fire and retain the original focus point.
I need to do some digging on this. I did a lot of reading on this camera before buying and this is one of those things I never heard about, so it may be something new, and it may just be a "duh" thing that only I didn't pick up on. But regardless, I suspect others will run into this and I wanted to at least get it on the board here.
I use AF-S mode a lot. It comes from my days shooting film where I'd focus and recompose, and while I've recently tried to really break myself of the habit and use focus points, I still do this a lot with static subjects. This hasn't been an issue for me until I got the D750. Let me explain.
I've changed all my cameras to back-button focus, which means that the AE-L/AF-L button is now set to AF-ON. This has never stopped me from focusing on a center point, reframe and fire. But I noticed very quickly that when I did this with the D750 it wouldn't fire. I had my AF-S Priority Select menu option set to Focus (vs. Release), just like every other camera I own, but when I'd reframe the shot wouldn't fire. When I was out today I decided to just not figure it out, changed the setting to Release and shoot away - thankfully everything worked out fine. So, when I got home, I started investigating why this was happening.
When I use AF-S, I use single point, and every camera (up to now) gives me a choice of a single point or an Auto selection. With the D750, however, when I choose AF-S mode I have a choice of modes (my word - I am without the manual as I type) that it operates in - Auto, S(ingle point) and Group. I assumed that Single Point would be appropriate as it is the only one that gives you a single AF point in the viewfinder. However, if you lock focus in on that point and then recompose, if the subject under that now-recomposed point isn't in focus the camera will not fire (with the AF-S Priority Select set to Focus)!! I have to tell you, it was making me crazy today. I verified this at home - choose a focus point, engage autofocus, recompose and attempt to shoot and it will not fire. But, if you change the mode to Group, which now surrounds the point with add'l focal points, it doesn't seem to matter how much or far you recompose, it will fire and retain the original focus point.
I need to do some digging on this. I did a lot of reading on this camera before buying and this is one of those things I never heard about, so it may be something new, and it may just be a "duh" thing that only I didn't pick up on. But regardless, I suspect others will run into this and I wanted to at least get it on the board here.