« Reply #20 on: November 24, 2012, 11:19:55 PM »
Great deal! Wish it worked with my 800 without needing a hardware fix.
Hi Paolo,
I have a 800mm and it seems to work okay with my 5D III. I've not sent it in to Canon as it seems to function normally. I've heard of some issue with the IS and 5D III, but not sure I am experiencing any of the reported problem.
Kind regards,
Jason

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Cams: Canon 1Dx, 5D III, 60D
Zooms: 16-35mm f/2.8L II, 24-70mm f/2.8L II, 70-200mm f/2.8L II; Primes: Sigma 35mm f/1.4, 40mm f/2.8 STM, 50mm f/2 Makro-Planar T*, 85mm f/1.2L II, 100mm f/2.8L, 135mm f/2L, 300mm f/2.8L IS II, 600mm f/4L II
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