Agreed! I still do not feel Tamron ever got enough credit for their awesome SP series. Now that I own 2 systems, 1 APS-c & 1 FF, the Adaptall philosophy pays even more dividends. The 151b behaves so differently on the K20d & D700, that is is like

David & Pidosphere--excellent wok with the 01a. I am currently negotiating to buy a copy of this little beauty. I loved the Adaptall lenses on my K20d, but am now head over heels with these Tamron creations on my D700. I can't believe the IQ level

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