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80-200 AF-S ED Focus Problem When Tracking
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<blockquote data-quote="nickt" data-source="post: 470839" data-attributes="member: 4923"><p>These are just questions to be aware of for a good understanding, I'm not looking for answers.</p><p></p><p>What focus mode are you in? ( like single or 3d or auto area or dynamic & how many points?)</p><p>What focus servo mode are you in? AF-S, AF-C or AF-A? AF-C on most bodies has 'release' or 'focus' priority associated with it a menu item. Often complaints of focus problems in af-c are due to folks not understanding that the shutter will not wait for focus in af-c if release priority set. This is further muddied by a menu setting for focus tracking lock (a3 on d7000) which can introduce a delay to continuous focus.</p><p></p><p>AF-A is switches from af-s to af-c but few people have a like for it. It is really not clear what mode you are in when you use af-a.</p><p></p><p>I know I babbled a lot here, but take the time to understand the details of continuous mode and you will be in a better spot to evaluate your lens. If you are looking for a quick-start, then try single point mode, af-c and set for FOCUS Priority. That would be menu A1 on your d7000. Set menu A3 to off. These are not necessarily the best settings, but you should be able to get a solid focus with these settings. There are two basic things that happen with focus. First is how does the camera acquire a focus point (single, dynamic, etc). Single point will keep it simple. Second part of the process is what it does after identifying a focus point, which would be the servo mode and release mode. Focus priority will make the shutter wait for focus so you can observe lens behavior. The shutter will not fire until you have focus. </p><p></p><p>Hopefully your lens is fine. Good sign that it behaves normally for single focus.</p></blockquote><p></p>
[QUOTE="nickt, post: 470839, member: 4923"] These are just questions to be aware of for a good understanding, I'm not looking for answers. What focus mode are you in? ( like single or 3d or auto area or dynamic & how many points?) What focus servo mode are you in? AF-S, AF-C or AF-A? AF-C on most bodies has 'release' or 'focus' priority associated with it a menu item. Often complaints of focus problems in af-c are due to folks not understanding that the shutter will not wait for focus in af-c if release priority set. This is further muddied by a menu setting for focus tracking lock (a3 on d7000) which can introduce a delay to continuous focus. AF-A is switches from af-s to af-c but few people have a like for it. It is really not clear what mode you are in when you use af-a. I know I babbled a lot here, but take the time to understand the details of continuous mode and you will be in a better spot to evaluate your lens. If you are looking for a quick-start, then try single point mode, af-c and set for FOCUS Priority. That would be menu A1 on your d7000. Set menu A3 to off. These are not necessarily the best settings, but you should be able to get a solid focus with these settings. There are two basic things that happen with focus. First is how does the camera acquire a focus point (single, dynamic, etc). Single point will keep it simple. Second part of the process is what it does after identifying a focus point, which would be the servo mode and release mode. Focus priority will make the shutter wait for focus so you can observe lens behavior. The shutter will not fire until you have focus. Hopefully your lens is fine. Good sign that it behaves normally for single focus. [/QUOTE]
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80-200 AF-S ED Focus Problem When Tracking
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