Tokina AT-X 80-200 2.8 manual focus with 2X teleconverter

[David Zaninovic]

Hi,

    Is anybody using Tokina AT-X 80-200 2.8 with a teleconverter ?  Which one ?  How 
bad is the optical quality ?  What would be the
best 2X TC to use, 2X-S ?

Thank you,
David Zaninovic