Eyepiece‐
Ocular Lens
Objectives
Course Focus Knob
Stage Fine Focus Knob
Diaphragm
Base
Light Source
Used to view the specimen
Moves the stage a lot
Moves the stage a little
Keeps microscope securely on flat surface
Works with the eyepiece to magnify specimen
Surface the slide with specimen rests on
Controls the amount of light on specimen
Makes specimen visible Magnification (Objective Lenses):
• Low Magnification (Red Objective Lens): – 10 (eyepiece) x 4 = 40x
• Medium Magnification (Yellow Objective Lens): – 10 (eyepiece) x 10 = 100x
• High Magnification (Blue Objective Lens): – 10 (eyepiece) x 40 = 400x