Focal issues with 24-105 L lens on 7D

[Tamiww]

Recently purchased a 24-105 L lens for my 7D and have found that in many photos are out of focus.  Shot a group yesterday and took over 50 photos.  Although the photos look o.k. when you get up close it seems nothing in the entire photo is sharp.  Is anyone else having this issue and is there a fix? 

[7D5D]

Some more resources for testing your 24-105

Take note under the section "Principles of Optical Testing",  Item 4 "An element just a bit off center can cause chromatic aberration, astigmatism, coma and edge softness"

http://www.canonrumors.com/tech-articles/how-to-test-a-lens/

http://www.lensrentals.com/blog/2012/05/testing-for-a-decentered-lens-an-old-technique-gets-a-makeov...

There is no hard data to back this up (and I certainly don't want to make any false accusations) but I have read lots of post and comments where people have had QC issues with the 24-105 lens and had to exchange it for a replacement copy.  I was one of them.  My brand new copy (not from a kit) had a huge air bubble in the front element.  My second copy has been just fine.  Maybe these numerous post are misleading because of the mass numbers of this lens in the field compare to other lens.  Anyway I think the 24-105 is a fantastic lens and one of Canons very best valued lens.

After your testing, if you think you've got a defective lens, get it sent in to Canon before the warranty expires.  Good luck and post your findings if you wouldn't mind.

[schmegg]

Have you tried with IS off?

There have been some reports of IS causing blurring with some copies (my copy is fine). So, if you had IS on, perhaps try some test shots with it on and off and see if you can see any difference.