D7000 AF-ON

Discussion in 'Nikon' started by jeff_becker, Jul 21, 2011.

  1. I recently programmed my AE-L/AF-L button on my D7000 to perform the 'AF-ON' function, since I sorely miss that button after using my D300.
    Anyway, I have noticed that I can attain focus faster in my viewfinder (noted by the dot that appears to signal focus is attained) by using this ad hoc 'AF-ON' button, than I can if I simply press the shutter button down halfway. This both surprised me and alarmed me. I was shooting live music under very dark conditions, and this was my first time using the D7000 but I was curious if any other D7000 owners have experienced this, or could test it also.
    I love the quality of the D7000. I just am not sure why they chose to exclude the very helpful AF-ON button that was on the D300.
  2. Are you using a VR lens?
  3. No. For the show, I was using the Nikon 35mm 1.8 AF-S.
  4. ShunCheung

    ShunCheung Administrator

    Nikon had to eliminate the dedicated AF-ON button because the D7000 is a smaller camera; there is just not enough space for both AF-L/AE-L button and AF-ON button. Otherwise, it would be very crowded and it is easy to press the wrong button.
    If you must have AF-ON, you can always adjust your Custom Setting f5 and turn that AF-L/AE-L button into an AF-ON button. The main issue is that you cannot have it for both functions at the same time.
  5. Ergonomically, I like the D300 better than the D7000 by a long shot....but this is from a traditionalist - and I don't care for the video or Live View options of the new cameras...and I know that a lot of the real estate on the new camera bodies is eaten up by these new features. I did program my AE-L/AF-L button on my D7000 to work as 'AF-ON' but the button is a little too far to the left to be perfectly positioned for a thumb when holding the camera properly. Plus, it seems to work faster for AF than pushing the shutter button down halfway.
    I think the D300 is work of art, and with the battery grip it's an absolute steal of a deal right now on the used market. For someone who doesn't need FX or video, the D300 is a tremendous bargain currently. I'm keeping mine!! :)
  6. ShunCheung

    ShunCheung Administrator

    Sorry Jeff, I sort of mis-read your opening post.
    Pressing the shutter release button half way to initiate AF has been around as long as AF itself. I have been using that feature since the N8008 and F4 like 22 years ago.
  7. No apology needed Shun. By the way, your postings on here are always top notch and I've learned from many of them! Thank you!
    I used the D7000 at ISO 3200 and the results were fabulous.
  8. Seems you D7000 guys are saying the AF-ON button, works quicker than the half-press on the shutter button to 'lock-on' focus? That's worth knowing!
    Anyone know WHY this should be so??
  9. Mike, it's only the original poster that said AF-ON works quicker. And there is no reason why that would be. I'm sure there is some other explanation.
    However, am I delighted to learn I can restore my AF-ON button by function f5. Didn't know that I could do that as I am used to the dedicated AF button.
  10. D7000+ Nikon 50mm 1.8D +16-85.
  11. I will do some more testing this weekend with other lenses to see if I still notice a difference in speed to lock-on focus between the 'AF-ON' button vs the half-press of the shutter button - with my D7000. I agree there should be an explanation. I will report back.
  12. I think the explanation is you were comparing under uncontrolled conditions and only perceived a difference. I did a
    check on my D7000 w/ 18-200 and the AF seemed to operate the same with either switch.

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