6D with 24-105 f/4L IS USM sharpness problem

Started 2 months ago | Photos thread
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Azad_Shuvo New Member • Posts: 2
6D with 24-105 f/4L IS USM sharpness problem

1/125 sec. f/7.1 105mm

I am facing problem with this 24-105 lens. when it is set to f/4 the image is not sharp at all. it is sharpest at f/9 i have tried AF micro adjustment , nothing changed .   but my camera works well on 50mm 1.8 and 24-70 f/2.8L II USM  i have tried taking video clip also ,  also same situation there . but this lens works fine in another 6D body (lens was bought as a kit lens with this body).    what should i be doing

1/250 sec. f/4 105mm

this is how it looks on f/4 no matter what i do . image looks like it was wiped with some liquid or something like that .

Comment & critique:
Please provide me constructive critique and criticism.
Canon EOS 6D
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