Tamron 1.4X F AF

Very Nice product overall. I liked the fact that it was fairly cheap, but with that it didnt have any of the extra stuff that the canon televonvertor had. Overally very Nice!

Image quality on same level as Canon 1.4x II converter, for $100 less. As is the case with the Canon teleconverter, AF will be affected on lenses with minimum apertures of f/5.6 or smaller, however, with the Tamron, AF is possible with both Canon...

I have used this TC with both a Tamron 70-300 and the Canon EF 28-135 on the Canon 300D Digital Rebel.

I bought this mostly to use with a Sigma 70-300mm zoom I used to own. I also ended up using it with a Tamron 28-300 I used for a while with my D70, and with a Sigma 18-200 I still use. It worked admirably well with all three lenses, though I haven't...