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Photography Q&A
Blur Reason
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<blockquote data-quote="WayneF" data-source="post: 527130" data-attributes="member: 12496"><p>The manuals say that is backwards. Newer models have the menu to select priority, but the AF-C default is Release (shutter activates immediately when button is pressed). AF-S default is Focus (shutter activation requires waiting to find focus first). The A1 and A2 menu can change them.</p><p></p><p>Older models like D90 worked the same as these defaults, but no had menu to change it.</p><p></p><p>My bet is that AF-C is the prime suspect cause of the blur. Focus is probably slower in the dimmer light, but AF-C Release priority is a problem in any light, unless we hold half press and wait for it.</p><p></p><p>My notion is that Release priority for AF-C is for continuous shutter of fast motion, so it will keep looking for focus, and hopefully find it for the 2nd or 3rd shot.</p><p>But stationary subjects have absolutely no use for AF-C.</p><p></p><p>The manuals all clearly say (D90, page 54):</p><p>AF-S is for stationary subjects.</p><p>AF-C is for moving subjects.</p><p></p><p>My complaint with the older rotary switches selecting this (under the lens release button) is that they can accidentally be touched and changed to AF-C when we don't want it. Newest models finally add a push button to make this more intentional. I think it is a very exceptional fast moving subject for me to even consider anything but Single Point AF-S and focus priority. I like pictures to be in focus. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>I strongly agree with Marcel about the single point. Single point lets us easily put focus exactly where we want it. Multiple points means we don't know where it might choose to focus. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="WayneF, post: 527130, member: 12496"] The manuals say that is backwards. Newer models have the menu to select priority, but the AF-C default is Release (shutter activates immediately when button is pressed). AF-S default is Focus (shutter activation requires waiting to find focus first). The A1 and A2 menu can change them. Older models like D90 worked the same as these defaults, but no had menu to change it. My bet is that AF-C is the prime suspect cause of the blur. Focus is probably slower in the dimmer light, but AF-C Release priority is a problem in any light, unless we hold half press and wait for it. My notion is that Release priority for AF-C is for continuous shutter of fast motion, so it will keep looking for focus, and hopefully find it for the 2nd or 3rd shot. But stationary subjects have absolutely no use for AF-C. The manuals all clearly say (D90, page 54): AF-S is for stationary subjects. AF-C is for moving subjects. My complaint with the older rotary switches selecting this (under the lens release button) is that they can accidentally be touched and changed to AF-C when we don't want it. Newest models finally add a push button to make this more intentional. I think it is a very exceptional fast moving subject for me to even consider anything but Single Point AF-S and focus priority. I like pictures to be in focus. :) I strongly agree with Marcel about the single point. Single point lets us easily put focus exactly where we want it. Multiple points means we don't know where it might choose to focus. :) [/QUOTE]
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