What’s the difference between NN3 and MKII?
A. The lower rotator as been changed. The new rotator in greatly improved and no longer do you need to adjust the lock screw which as been removed. In addition the MKII uses a ball bearing system rather than the detent pins increasing precision and durability. The lower rotator knob also has rubber edges. The MKII uses proprietary detent rings. Those with older NN3’s can upgrade with the newer rotator and will be able to use their existing rings……