Viewing and Projection Eyepieces
f
f'
b
Eyepiece Lens
System
System
Eye
Lens
Lens
I'3
D(e)
(Infinity)
-b (=a')
b'
a
I3
I4
F(e)
F'(e)
Eyepiece Mode
Projection
Viewing
Diaphragm Diameter