Faulty lens or am I asking too much of it?!

Started Mar 7, 2013 | Questions thread
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pw3010
pw3010 New Member • Posts: 5
Faulty lens or am I asking too much of it?!

I recently purchased a Canon EF 100-400mm f/4.5-5.6L IS USM, and I'm getting some good shots out of it, but I'm also noticing some issues.

On getting towards the lenses maximum zoom, I'm seeing a very noticeable halo effect. I've included a couple of images below, with some of the worst areas ringed. Note that I did not have the lens hood on when I took these shots. Would it make a significant difference?  I'm using a HOYA Pro1 UV filter on the lens, to protect it as much as anything else.

Do any owners of this lens recognize the issue, or am I looking at a faulty lens here?

Thanks,

Pete

Canon 5d mk ii, focal length 400mm, f/5.6, ISO 400, shutter 1/800

Canon 5d mk ii, focal length 400mm, f/5.6, ISO 400, shutter 1/800

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Canon EOS 5D
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