The MZ-S use a shutter designed for 1/8000s but tuned at 1/6000s inorder to increase durability and reliability and reduce power consumption.
The MZ-S is built to professional standard because it is based on a camera that was plannet to cost $8000 and designed for Pentax professional users in mind; both MF and medium format.
ROFL. Best Friday joke I heard until now.
cheers, caveman