Tim Taylor
work in progress
There's a similar thread relating to Nikon - my question relates to Canon and I haven't seen it answered anywhere so far.
Has anyone tested AF performance on a 30D (or similar) with the Sigma 500mm EX HSM with Canon, Sigma and Kenko 1.4x TCs? I've heard from a couple of sources that they think the Sigma will perform best. Does anyone have experience of all 3 or 2 out of the three on the same lens in similar conditions?
By the way, I'm assuming the use of a reporting TC with the pins taped.
Thanks
Tim
PS I have to say that I can't really see any reason why they should perform differently but I was told in one camera shop that the Canon wouldn't work at all which is clearly nonsense.
Has anyone tested AF performance on a 30D (or similar) with the Sigma 500mm EX HSM with Canon, Sigma and Kenko 1.4x TCs? I've heard from a couple of sources that they think the Sigma will perform best. Does anyone have experience of all 3 or 2 out of the three on the same lens in similar conditions?
By the way, I'm assuming the use of a reporting TC with the pins taped.
Thanks
Tim
PS I have to say that I can't really see any reason why they should perform differently but I was told in one camera shop that the Canon wouldn't work at all which is clearly nonsense.
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