borno Offline Upload & Sell: Off
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I use a tamron sp 2x on occasion as well. I had a canon 2x VI, and it was pretty decent on the 300mm f2.8 is I had. When the canon VIII came out with all the hoopla, I got one to try and it wasn't really any better in my opinion, a little better in the corners maybe and a tad less CA, but was hoping for more especially on my 70-200 is II. I wound up getting a Tamron from KEH and for the little I use it I'm happy with it.
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