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Nikon DSLR Cameras
D5100
Auto-focus isn't working on my prime lens
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<blockquote data-quote="Clovishound" data-source="post: 847556" data-attributes="member: 50197"><p>If you have the camera in manual focus mode, it will not autofocus regardless of whether you have the lens switch set to M/A or not. If you have the camera set to an autofocus mode, and the lens switched to M, it will not autofocus. The When in autofocus mode, the camera will autofocus when you half press the shutter, but while in half press, you can turn the focus ring and change the focus and then fully press the shutter to take the picture. That is how the system is designed to work. This is what the M/A on the lens switch refers to. </p><p></p><p>I looked at the 18-55 kit lens I have, and it doesn't have a switch for manual/autofocus. That means it will stay in autofocus mode unless you change it to MF in the camera. </p><p></p><p>If you are trying to get the camera itself out of MF mode, press the <em>i</em> button and look for the AF-M selection. Press it and choose AF-A, AF-S, or AF-C, depending on what mode you want. All three of these will give you autofocus operation. Be sure the lens selector is in the M/A setting. </p><p></p><p>I got this from the Pup's D5600, but it should be the same for your D5100.</p></blockquote><p></p>
[QUOTE="Clovishound, post: 847556, member: 50197"] If you have the camera in manual focus mode, it will not autofocus regardless of whether you have the lens switch set to M/A or not. If you have the camera set to an autofocus mode, and the lens switched to M, it will not autofocus. The When in autofocus mode, the camera will autofocus when you half press the shutter, but while in half press, you can turn the focus ring and change the focus and then fully press the shutter to take the picture. That is how the system is designed to work. This is what the M/A on the lens switch refers to. I looked at the 18-55 kit lens I have, and it doesn't have a switch for manual/autofocus. That means it will stay in autofocus mode unless you change it to MF in the camera. If you are trying to get the camera itself out of MF mode, press the [I]i[/I] button and look for the AF-M selection. Press it and choose AF-A, AF-S, or AF-C, depending on what mode you want. All three of these will give you autofocus operation. Be sure the lens selector is in the M/A setting. I got this from the Pup's D5600, but it should be the same for your D5100. [/QUOTE]
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Nikon DSLR Cameras
D5100
Auto-focus isn't working on my prime lens
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