Hi Alex
Just be carefull if you get the Bintel SCT Adapter, I think you will find that all these generic Adapters DO NOT have a stop at the end of the thread and will screw completely off the end of the barrel. The WO brand 2"/SCT Adapter has a stop at the end of the SCT thread to lock it against the barrel of the 66SD.
http://www.williamoptics.com/wo_shop...roducts_id=115
Andrews have them listed - P-SCT2A 2" SCT/ZS66 Adapter about $70.00
Cheers
John G