EF 70-200 IS iii USM - partial blurred image

[kirtapp]

I purchased this lens used about a year ago and have been noticing that I have images that are blurred at the bottom when shooting horizontal. I first assumed it was my camera shutter as I have a 1DXii that had a fairly high shutter count; however, I just obtained another and I’m seeing the result. 
Anyone have any suggestions on what’s going on and if this is possibly an expensive fix? 

Here is a link to a photo for reference: https://www.dropbox.com/scl/fi/pq9cdar782nuz55ufmrrw/Photo-Feb-28-2026-10-01-07-PM.jpg?rlkey=c63mvi8...

[shadowsports]

Greetings,

Since you've gone to the effort to post an image for us, please upload the RAW version if you have it. 

Thanks,

[rs-eos]

Do any photos in vertical orientation show blur along the left- or right-hand sides?

Since you've tried with two different camera bodies, looks like a potential lens issue.

Also, is this at any aperture?

[kirtapp]

Here is a link to view 4 raw images, 2 vertical and 2 horizontal. I hadn't really noticed it in the veritical ones but it seems to impact them also. 

[kirtapp]

https://www.dropbox.com/scl/fo/tovjf0ikk6070ru4dj7gt/AK3YDHI8tbx7KUA8fv0Mi5c?rlkey=xkb82rze6qpn0q6bk...

[kirtapp]

Appears to be at both vertical and horizontal. I can't say about any aperture. I mostly shoot sports and don't often move off 2.8

[ebiggs1]

First keep in mind most OOF issues are user caused and not equipment. That's not a slam it's just  a reality. People make more misques than the gear does. You need to set up a test. You need to use a tripod and a 90 degree perpendicular to the lens target. A newspaper taped to a wall for instance. A brick wall can work.

There are so many things that can cause OOF and you stripped all exit info so there is little to gain from your samples except proving some of them are soft. Your issue could be as simple as you were at an angle to the girls which impacted DOF. It could be motion blur from too slow SS. It could be subject motion form the girls. Who knows without all the info. But, my friend, the first place to look is behind the camera/lens. Do the simple test.

[kirtapp]

I am curious if you looked at the RAW images I uploaded. They should have all of the information accessible. You can see that the shutter is plenty high to stop action and some of them are straight on and not shot at an angle. I will perform some additional tests, but it's pretty clear to see that the images are pretty sharp in some spots but as you move down on horizontal and to the right on the verticals that they get extremely soft more than they should. 

[FloridaDrafter]

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@kirtapp wrote:

I first assumed it was my camera shutter as I have a 1DXii that had a fairly high shutter count; however, I just obtained another and I’m seeing the result.

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Another camera or lens? I'm assuming camera, just want to make sure I'm understanding 🙂

Newton

[kirtapp]

Correct. Same outcome on two different camera bodies.