NTB-1A	NTB-1B	NTB-2B	NTB-3A
Viewing Head	Binocular viewing microscope body	*	*	*	*
Eyepiece	WF10X/20	*	*		*
	SWF10X/23			*
	WF20X	*	*
Objective	Zoom 0.7X-4.5X, Working distance 95mm				*
	Zoom 1X-4X, Working distance 82mm			*
	Zoom 1X-4X, Working distance 97mm Auxiliary objective 2X	*	*
Transmitted Light	110V or 220V/6V20W T-H Lamp	*	*		*
	110V or 220V/12V10W T- H Lamp			*
Incident Light	110V or 220V/6V15W T-H lamp with reflector	*	*		*
	110V or 220V/12V10W T-H lamp with reflector			*
Option	Trinocular viewing microscope body	~	~	~	~
	Auxiliary Objective 0.5X, 0.75X, 1.5X, 2X			~	~
	Auxiliary Objective 0.4X, 0.5X, 0.75X, 1.5X,	~	~
	Eyepiece WF5X, WF12.5X, WF15X, WF20X, WF25X				~
	Eyepiece WF5X, WF15X, WF20X			~
	Eyepiece WF5X, WF15X, WF25X	~	~
	Photo attachment and video attachment	~	~	~	~