What Makes a System 273/373 Microscope Superior to a System 250 Microscope:
1. Greater Working Distance:
System 273/373 Microscopes have nearly 8" working distance - Nearly 45mm more working distance than System 250 Microscopes.
(Assumes both are used with a 0.5X Lens).
2. Greater Magnification: Optical Magnification:
System 273/373: Maximum Magnification: 270X
System 250: Maximum Magnification: 225X
3. Greater Field-of-View:

System 250 System 273/373