Issues with Canon EF-S 10-18mm f/4.5-5.6 IS

[ameerat42]

Cage left the GAS on and overcooked it

[anthonyk]

Cage left the GAS on and overcooked it

lol, so it wasn't just me then...

[Cage]

Cage left the GAS on and overcooked it

Am, I'm trying to help this guy find out what is wrong with his lens. Just adjusting brightness shouldn't introduces artefacts.

My gut feeling is that the lens is out of alignment.

[anthonyk]

Am, I'm trying to help this guy find out what is wrong with his lens. Just adjusting brightness shouldn't introduces artefacts.

My gut feeling is that the lens is out of alignment.

Thanks for your ongoing help I think I have come to the same conclusion. I have used a number of Canon's cheaper lens offerings over the years but have never encountered this problem. The moral of the story is don't buy a used lens from a Gumtree seller just because it is cheap. She could have dropped it at some point for all I know. My wife is out at the moment taking some more photos using the same lens but a different body. It will be interesting to see if she experiences the same issues.

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I am not sure where the focus point is on these photos. In the second photo for example, the fence post looks to be quite sharp but the trees are not. There is a free plugin for Lightroom that highlights the focus point in the photo. I haven't used it but it might shed some light on the problem: http://www.lightroomfocuspointsplugin.com/

As you said in the original post, it might be a user error.

Thank you. I will look into that plugin.

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Focus info screenshots.

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