![](images/objective.jpg)
![](images/bottom2.jpg)
![](images/slide.jpg)
Eyepiece
Image Plane
Reference Focal Length (L) 200 mm
Tube Lens
Infinity Space
Objective Magnification (M) 100x
M = L / F
M = 200 mm / 40 mm
M = 100x
Focal Length (F) 40 mm
Working Distance
Condenser
Specimen Plane
Reference Focal Length (L): 200 mm
Objective Focal Length (F): 40 mm