[说明]
Nauticam Multiplier 1 加倍镜 (需要与SMC-1合用)
Stack multiplier on top of SMC to get much more magnification wihle shorter working distance.
Providing 3.5X magnification when using a 100mm/105mm macro lens on a full frame camera.
Needed accessor to work with SMC: 81211 Flip hold..