23 of 24 people found the following review helpful
Great reach, no auto focus except Live Mode?
, December 1, 2011
This review is from: Canon EF 2.0X III Telephoto Extender for Canon Super Telephoto Lenses (Camera)
I bought this extender with the Canon 100-400 f4.5-5.6L lens, which is listed as a compatible match. It does work, and compared to the $14k for an 800mm lens I can't complain. But Canon should really be a little more clear in their description of what they mean by "compatible". The auto focus does not work when looking through the viewfinder, but it does work in Live Mode, which I find very odd. I have the set mounted on a T2i (550D).
Anyway, so long as you are prepared to manually focus on your subjects, this is a very cost effective way to get the long reach for wildlife shots, etc. Others have already commented on the quality, which for a novice like me, I did not notice any quality degredation from adding the extender
From Canon's support website for those considering this extender: "If an Extender (sold separately) is attached and the maximum aperture of the lens is f/5.6 or smaller (larger f/number), AF will not be possible (except Live mode/u Live mode AF)." So why couldn't they print this in the product description?
And I still don't get why AF will work in Live Mode, but not otherwise--if anyone knows the reason I'd love to hear it :)
Help other customers find the most helpful reviews
Was this review helpful to you?