Sony Alpha fit Bower* DG II Multi Coated Autofocus* x2 Teleconverter
It is fully compatible with all Sony Alpha AF* lenses (not SAM/HSM).
*Although brander Bower it's made by Teleplus -'the teleconverter experts
*Autofocus works with lenses having F4 or faster aperture, it will also work with slower lens but you may need to use it on manual focus, you will still get focus confirmation and exposure will still be fully automatic.
Sony "A" Mount, not for NEX or "E" mount bodies IF YOU DO NOT UNDERSTAND WHAT THIS MEANS MESSAGE BEFORE PURCHASE