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Jan 23, 2017 at 8:17 history edited Michael C CC BY-SA 3.0
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Oct 8, 2011 at 19:11 vote accept bwDraco
Oct 8, 2011 at 19:11 comment added bwDraco In any case, while every phase detection AF system has a hard limit (typically around f/11 AFAIK), the fact that Canon has these limitations that are set above these hard limits means that this answer most directly answers the question.
Oct 8, 2011 at 15:27 vote accept bwDraco
Oct 8, 2011 at 18:42
Oct 8, 2011 at 14:51 comment added dpollitt I agree 100%, its a workaround, not a complete solution.
Oct 8, 2011 at 14:48 comment added bwDraco From what I've read, the tape trick results in unreliable AF. The camera may cope in brighter conditions with high contrast, but will hunt and fail to acquire focus in low light or low contrast, depending on the camera body.
Oct 8, 2011 at 3:49 history answered dpollitt CC BY-SA 3.0