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<blockquote data-quote="Horoscope Fish" data-source="post: 342999" data-attributes="member: 13090">I use a polarizing filter practically all the time when shooting outdoors and have never had an issue. DSLR's require a CPL (or circular polarizing filter, but the word circular does not refer to the shape). If by some chance you have a &quot;Linear&quot; polarizer on your lens, then yes; that could be confusing your AF system. Looking at your shot I see you were shooting at f/4.5 and 1/60 second. With good technique that should be enough depth of field for that shot, but a lot depends on the scene. The fact nothing appears to be in-focus makes me suspect &quot;pilot-error&quot; is at fault here and that what we're seeing is simply a lot of camera shake. That being said I *am* dubious about the Auto-Area Focus Mode, personally. If you're getting a lot of shots like the one you posted above try using AF-A as your Focus Mode, with either Dynamic Area or Single Point AF-Area Modes. Single Point would be the safer the two, but it can be slower than Dynamic.....</blockquote>

[QUOTE="Horoscope Fish, post: 342999, member: 13090"] I use a polarizing filter practically all the time when shooting outdoors and have never had an issue. DSLR's require a CPL (or circular polarizing filter, but the word circular does not refer to the shape). If by some chance you have a "Linear" polarizer on your lens, then yes; that could be confusing your AF system. Looking at your shot I see you were shooting at f/4.5 and 1/60 second. With good technique that should be enough depth of field for that shot, but a lot depends on the scene. The fact nothing appears to be in-focus makes me suspect "pilot-error" is at fault here and that what we're seeing is simply a lot of camera shake. That being said I *am* dubious about the Auto-Area Focus Mode, personally. If you're getting a lot of shots like the one you posted above try using AF-A as your Focus Mode, with either Dynamic Area or Single Point AF-Area Modes. Single Point would be the safer the two, but it can be slower than Dynamic. [COLOR=#ffffff]....[/COLOR] [/QUOTE]

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