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Re: How much does a 2x convertor impact final image quality
I don't have the Sigma lens but I do have the Nikon equivalent. I use the Nikkor 1.7 times TC but the Kenko Pro 1.4x and 2.0x. I think they measure up well to the Nikon.
I have got a set of pics with the the 300 and 600 with all three covertors which I took in the Autumn. I'll post up these up and I'll try a set with the 70-200 this weekend.
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