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Should I return/replace my lens? EF-S 55-250mm sharpness/focus

Started Jun 7, 2018 | Questions thread
photonius Veteran Member • Posts: 6,895
Re: Should I return/replace my lens? EF-S 55-250mm sharpness/focus

streetsnyc wrote:

Hi,

I'm concerned about the sharpness of my lens. Can you guys help me see if there's anything wrong with it?

Lens: Canon EF-S 55-250mm
Body: Canon Rebel T6i

I use autofocus on the center point, and I do believe that I use settings that are generally supposed to come out with sharp photos, such as an appropriate aperture + 1/FL, etc.

I'm still within the return period, and am wondering where the problem lies: lens, body, or perhaps it's just operator error? Or perhaps all of these images are acceptably sharp for this lens.

Many thanks in advance for your help

Focus point is on back of head, but hair seems to be not "tack-sharp." I submitted this to ShutterStock and it got rejected for out-of-focus.

Fur seems blurryish

as mentioned by others, the cat shots with ISO 4000 or 3200 show lots of processing artefacts, that's not the lens.

start off with something static and flat, using live view and a tripod to check if the lens is sharp, 100 ISO.

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