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Released in April 2011, the D5100 replaces the D5000 as one of Nikon's popular consumer DSLR cameras. It features a replaceable Nikon F-mount lens.

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new lens back focusing problem

i never had this problem before. i had the 18-55mm kit lens, it focused fine. and then recently bought a new sigma 18-250mm lens, and suddenly i'm getting soft photos.

i lately realized it wasn't a lens quality problem, it was back focus.

when i'm shooting portraits for example, i keep a focus point on the eye, but what i'm getting in focus is an ear or something!!

this is persistent in every focus mode, and at all focal lengths.

i think its getting worse with time, it started with like 30% of the shots, now its like 90% is OUT OF FOCUS SHOTS! what do i do guys, help me.

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No matter which mode, what menu setting, or which lens, my D5100 was sporadic in automatically focusing, and. like you, Ahmed Azmy, now it occurs more than 80% of the time.

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I most likely is focus shift - and a 'bad lens'.

If you can, you should return it for a properly working one.

try shooting 'full open' and see how the results are - if they are better, its focus shift.

if its not focus shift, then maybe the lens can be fixed by a qualified technician - not sure how 'easy' the are to work on.

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