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AF won't autofocus - Canon Cameras

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  • 12string May 14, 2008

    auto focus trys to tur lens. no red focus points lite up , no picture taken green lite to the right of a number 9 in the right of the view finder blinks. switch lens to manual focus and try to focus lens still will not focus, distance scale in the window on top of lens dose not move but picture is taken. the lens is a 50mm 1.4 usm

  • Anonymous Jan 18, 2009

    I have the same prob. The auto focus on my 400D suddenly stopped working. There is a 9 in the bottom right corner of view finder that will not change. I have tried removing the lens (standard 18-55mm), taking a pic and then replacing it, also tried a different lens. Nothing works.

  • Anonymous Feb 23, 2009

    I have the same problem. I had a 75-300MM lense on the camera and removed it and put the standard 18-55 lense back on and the autofocus wouldn't work and tthe picture won't even take. I took the lense off the cameran and took a picture and the mirror moved and the picture took

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I had a similar problem with my XTi. I swapped between two lenses and the issue stayed with the camera most likely because the AF logic is in the camera, and not the lens. What fixed my issue was when I took the lens off, and tried taking a picture to see how the mirror reacted. Sure enough, something was blocking my mirror from activating during the shot. I didn't see anything blocking, so I assumed it was "stuck". I moved the mirror, and after that, the AF worked fine when I put the lens back on. Not sure if this will help.

Posted on Jul 20, 2008

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I had the same problem. I had AF mode set to AI Servo, as soon as I switched to AI Focus or One shot everything started working again. Hope this helps

Posted on Feb 25, 2009

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Operating nikkor 70-300mm f4.5-f5.6 with nikon d5100


No Nikon lens ever zooms automatically, so I assume you mean focus.
The D5100 lacks an autofocus motor, requiring the lens to have one. The older 70-300mm lenses lack this motor, expecting the camera body to have one.
The D5100 will only autofocus with lenses designated AF-S or AF-I. It will not autofocus with older AF-D and AF-G lenses.

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Aperture ring won't turn


When the camera is set to autofocus, let the camera do the focusing. If you want to focus manually, turn off the autofocus so you can turn the focusing ring.

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Why wont my Nikon af nikkor 70-300mm G lens autofocus its self with my D5000 camera


The D5000 does not have a focus motor in the body, relying on the lens to have one. The old 70-300mm G lens does not have a focus motor, relying on the camera to have one. Thus, this combination will not autofocus.
The newer 70-300mm AF-S G lens, as well as the even newer 70-300mm VR AF-S lens, do have the autofocus motor and thus will autofocus on the D5000.

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The auto focus does not work properly with this lens on either my Nikon D5000 or D7000. I have tried all possible combinations of AF settings. Typicaly, when I use single point to focus, the subject I...


Hi, It wouldn't autofocus on the D5000 as the body doesn't have an auto focus motor in the body and since that lens is AF, not AF-S, it won't autofocus. It should autofocus on the D7000 though, how far away are you from the object you're trying to photograph?

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I have a Nikon D40x and purchased the AF nikkor 50 mm f/1.8D lens a couple years ago, but find that it can only be focused manually. Is there any way to "turn on" the autofocus? I have not had...


Sorry, but the D40x lacks an autofocus motor, depending on the lens to have one. Nikon calls such lenses AF-S. This particular lens does not have such a motor, relying on the camera to have one. The only 50mm lens currently available with an autofocus motor is this one:
http://www.nikonusa.com/Nikon-Products/Product/Camera-Lenses/2180/AF-S-NIKKOR-50mm-f%252F1.4G.html

Earlier this week the Nikon web site listed a new 50mm F1.8 lens with an autofocus motor, but then it was removed. Hopefully they will officially announce this lens soon.

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1 Answer

Just bought a new eos d600 . How do I turn on the autofocus?


Set the autofocus switch on the lens to AF. Press the autofocus button on the camera (right on the cursor pad) to bring up the AF mode. Use left/right or turn the command dial to select the desired autofocus mode and press SET.

It's in the "Changing the Autofocus Mode" in the manual (page 83 in my copy).

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I got this lens (Nikon AF NIKKOR 50mm f/1.4D) for my D3100 and it doesn't autofocus. I don't knowhow to intervene since there's no switch on the lens itself (because I understand it is small and it doesn't...


The D3100 can't autofocus with this lens. The D3100 does not have a focus motor, depending on the lens to have one. The AF-Nikkor 50mm doesn't have a focus motor, depending on the camera to have one.

To autofocus, you need lenses designated AF-S.

Dec 24, 2010 | Nikon Normal AF Nikkor 50mm f/1.4D...

1 Answer

I have a Nikon D60 and my autofocus has stopped working. It is not because of the lense because i have tried other lenses and the auto focus won't work with them either so it must be an issue with the...


You should check custom menu setting 2, and make sure it's set to one of the auto modes. Make sure the lenses you are using are AF-S and not regular AF lenses. The D60 has no autofocus motor, so autofocus only works with AF-S lenses.

I always suggest folks take a look at Ken Rockwell's website also, here's a link to a specific page on autofocus on the D60.

Post a comment here if none of this works and I'll see what else we can do.

http://www.kenrockwell.com/nikon/d60/af-settings.htm

Jan 08, 2010 | Nikon D60 Digital Camera

1 Answer

Autofocus on 300mm 2.8 IS not working with 50D


Make sure the AF/MF mode button on the lens is set to AF.
What focusing mode do you have selected in the camera? Single Shot, AI focus or AI Servo? 
If Custom Function "C.Fn IV -1 Shutter button/AF-ON button" is set to option 2 or 3, the AF will start when you press the AF-ON button.
I hope this help you!
/Chris

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