The 8-15mm fisheye is famous for having a lens cap that automatically removes itself from the lens...
http://www.canonrumors.com/forum/index.php?topic=11879.0
http://www.the-digital-picture.com/Reviews/Canon-EF-8-15mm-f-4-L-USM-Fisheye-Lens-Review.aspx
The best solution I have found for my 8-15mm is the soft-side-of-the-Velcro modification:
http://www.the-digital-picture.com/News/News-Post.aspx?News=1132
It looks like the lens cap for the new 11-24mm has its release tabs on the top & bottom (the same as the problematic 8-15mm fisheye), so when its mounted on a camera, & the camera/lens combo is placed on a hard table, the bottom release-tab may get pressed resulting in the cap accidentally popping off... My new 11-24mm should be arriving on Wednesday, and I'm going to really want to take care of that enormous front element, so I'm keeping the Velcro handy...
http://www.canonrumors.com/forum/index.php?topic=11879.0
http://www.the-digital-picture.com/Reviews/Canon-EF-8-15mm-f-4-L-USM-Fisheye-Lens-Review.aspx
The best solution I have found for my 8-15mm is the soft-side-of-the-Velcro modification:
http://www.the-digital-picture.com/News/News-Post.aspx?News=1132
It looks like the lens cap for the new 11-24mm has its release tabs on the top & bottom (the same as the problematic 8-15mm fisheye), so when its mounted on a camera, & the camera/lens combo is placed on a hard table, the bottom release-tab may get pressed resulting in the cap accidentally popping off... My new 11-24mm should be arriving on Wednesday, and I'm going to really want to take care of that enormous front element, so I'm keeping the Velcro handy...
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