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  1. #1
    Senior Member
    tea2085's Avatar

    can I assign the fn button to single point focus as well as continuous focus?

    In other words flip back and forth between the 2? I have the d7100 and have read and watched videos about the fn button but am still lost, if it can be done, could I please get someone to gently walk me through the steps?
    thanks, paul


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    Camera -D7100------ Lenses- Nikkor 35mm F/1.8G, Nikkor 70-300mm F/4-5-5.6G ED VR, Tokina 12-28 F/4 and Nikkor 16-85 VR.



  2. #2
    Senior Member
    FredKingston's Avatar

    Re: can I assign the fn button to single point focus as well as continuous focus?

    Why not google Back Button Focus and understand that first... ???

  3. #3
    Senior Member
    tea2085's Avatar

    Re: can I assign the fn button to single point focus as well as continuous focus?

    Fred I have been using bb focus for the last 2 years! I don't know why that would help me with my question. I would like to assign a button for a quick change to settings!
    Thanks, Paul
    Camera -D7100------ Lenses- Nikkor 35mm F/1.8G, Nikkor 70-300mm F/4-5-5.6G ED VR, Tokina 12-28 F/4 and Nikkor 16-85 VR.

  4. #4
    Senior Member
    FredKingston's Avatar

    Re: can I assign the fn button to single point focus as well as continuous focus?

    Well, Continuous Focus is already assigned to the BackButton... or should be if your BB is setup correctly...

    I just checked my D600, and None of the Focus mode/settings are available to be assigned to the Fn button, or the Preview button...

  5. #5
    Senior Member
    Roy1961's Avatar

    Re: can I assign the fn button to single point focus as well as continuous focus?

    can I assign the fn button to single point focus as well as continuous focus?
    i have my Fn1 button to group focus along with my BBF at single focus, i switch between the two, i got it from here, if i rem correct he does it opposite to what i have. I have a D500, hope it works for you??

    https://www.youtube.com/watch?v=MCI1tL-aHcE&t=375s
    Learn to laugh at yourself, everyone else is.
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  6. #6
    Senior Member

    Re: can I assign the fn button to single point focus as well as continuous focus?

    Your question is not clear exactly what you want to switch between.

    Single Point Focus is an AF Area Mode. The choices are: Single Point, Dynamic 9, 21 or 51pt, 3d tracking and Auto Area.

    AF-C is a Focus Servo Mode. The choices are AF-C, AF-S, and AF-A. That means continuous servo autofocus, single servo auto focus or automatic switching.

    Back button focus (when set up correctly) gives you af-c and a psuedo af-s mode depending how you use the button. Is that what you want? Hold the button and get continuous focus. Let the button go and in effect you have af-s mode even though you are still technically in af-c. The downside is you do not get to choose focus priority, you are always in release priority.

    If you are looking to change the AF Area Mode from single to one of the multipoint modes, no, you can't do that with the fn button. You can do that fairly quickly from the button in the middle of the af/m lever on the front of the camera though. Press button and use front wheel to change area modes.

    On the d7100, I don't think you can do what is shown in the d500 video above.
    Thanks/Like hark Thanks/liked this post
     
    I must have a really good camera.

  7. #7
    Staff
    Super Mod
    hark's Avatar

    Re: can I assign the fn button to single point focus as well as continuous focus?

    Quote Originally Posted by nickt View Post
    Back button focus (when set up correctly) gives you af-c and a psuedo af-s mode depending how you use the button. Is that what you want? Hold the button and get continuous focus. Let the button go and in effect you have af-s mode even though you are still technically in af-c. The downside is you do not get to choose focus priority, you are always in release priority.
    I'm having trouble understanding what Paul wants, too.

    As Nick explained, if you want to switch between AF-C and AF-S, all it requires is to focus with the back button, remove your thumb from the back button, and recompose if desired. Then just press the shutter button to take the photo. That replicates AF-S.

    Another alternative is to set up U1 or U2 with whatever change you want. My U1 is set up for BBF in Aperture Priority, AF-C. U2 is set up for BBF in Manual Mode, AF-C. My regular Aperture Priority is set for AF-S, and so are Manual Mode and Shutter Priority. All I need to do is to switch between U1, U2, or A (since I mostly shoot in Aperture Priority without BBF). I can quickly switch between BBF and no BBF.

    All of my options are set for single point focus, but you can program U1 or U2 to use multiple focus points if desired.
    Last edited by hark; 02-20-2018 at 05:00 PM.
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  8. #8
    Senior Member
    tea2085's Avatar

    Re: can I assign the fn button to single point focus as well as continuous focus?

    You guys have answered my question (I think) I just want to quickly change from continuous A/F to single point A/F focus very quickly (without having to go to menu) You guys probably answered my question- thank you. I just need some time to digest the replies- busy today. Thank you- Paul
    Camera -D7100------ Lenses- Nikkor 35mm F/1.8G, Nikkor 70-300mm F/4-5-5.6G ED VR, Tokina 12-28 F/4 and Nikkor 16-85 VR.

  9. #9
    Senior Member

    Re: can I assign the fn button to single point focus as well as continuous focus?

    Quote Originally Posted by tea2085 View Post
    You guys have answered my question (I think) I just want to quickly change from continuous A/F to single point A/F focus very quickly (without having to go to menu) You guys probably answered my question- thank you. I just need some time to digest the replies- busy today. Thank you- Paul
    If you mean switching from af-c to af-s, then you have that already at your fingertips with bbf as Cindy explained. Just let go of the back button after you focus. This is good for focus/recomposing. However, if you need to be able to lock focus before the shutter will fire, like for birds in flight see my next post below.
    Thanks/Like hark Thanks/liked this post
     
    I must have a really good camera.

  10. #10
    Senior Member

    Re: can I assign the fn button to single point focus as well as continuous focus?

    Quote Originally Posted by hark View Post
    I'm having trouble understanding what Paul wants, too.

    As Nick explained, if you want to switch between AF-C and AF-S, all it requires is to focus with the back button, remove your thumb from the back button, and recompose if desired. Then just press the shutter button to take the photo. That replicates AF-S.

    Another alternative is to set up U1 or U2 with whatever change you want. My U1 is set up for BBF in Aperture Priority, AF-C. U2 is set up for BBF in Manual Mode, AF-C. My regular Aperture Priority is set for AF-S, and so are Manual Mode and Shutter Priority. All I need to do is to switch between U1, U2, or A (since I mostly shoot in Aperture Priority without BBF). I can quickly switch between BBF and no BBF.

    All of my options are set for single point focus, but you can program U1 or U2 to use multiple focus points if desired.
    The U's are a good idea if Paul is looking for af-c or af-s with focus priority but still wants to mostly use bbf. After we were talking about U settings last week, I updated one of my U's for shutter button focus, af-c with focus priority. I love bbf and what it does for me 99% of the time. The one area where it falls short for me is birds in flight. It is much like skeet shooting trying to catch a bird in flight with af-c and release priority. So I want to try something that won't fire unless focus is locked. The d7100 and d7200 override the af priority menus a1 and a2 once you set the back button to af-on. You are stuck with release priority when using bbf no matter what you set in a1 and a2. I think the d7000 respected the a1 and a2 priority menus with bbf set. No idea on how other Nikon's handle priority with the bb set for focus. I don't think the manuals explain this detail.
    Thanks/Like hark Thanks/liked this post
     
    I must have a really good camera.





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