Leica M125 B Manuel D’Utilisation

Ever since their introduction by Horatio S. Gree-
nough, stereomicroscopes have worked accord-
ing to the optical principles based primarily 
on Ernst Abbe's research. For over a century, 
ingenious optics designers and engineers have 
worked to push magnification, resolution and 
image fidelity to the limit permitted by optics.

In doing so, they have always been constrained 
by the interrelation between three factors: the 
higher a microscope's resolution, the lower the 
available working distance. If one increases the 
distance of the optical axes, the three-dimen-
sional image seen by the observer becomes 
distorted— a sphere becomes an ellipse, a flat 
surface curves towards the observer.