Iphone 4S camera problem

hello. have slight problem 4s camera.

works fine have blurry spot in upper right corner extending lower right. whole part blurrier rest of picture.

think it's hardware problem ,lens related ,since it's can't focus in part of image.

close-ups come out fine ,sharp overall , no problems.


tried restore no luck. tried tap-to-focus on corner ,same problem.

here shots (full resolution) problem:










lens clean dirt issues out of question.

i'm running ios 5.0.1 if makes sense.



what's problem here? can replacement problem? doubt it's software issue...

or other way can solve it?
else facing similar problem?

, sorry big pictures ,but otherwise can't see spot well...

 

i can't see seeing take apple store , show them , swap out if can see it.

 

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