Estimating Specimen Size

• Label the diagram below

  A) Body Tube

  B) Ocular Lense (Eyepiece)

  C) Arm

  D) Stage

  E) Coarse Adjustment Knob

  F) Fine Adjustment Knob

  G) Base

  H) Light Source

  I) Diaphragm

  J) Stage Clips

  K) Objectives

  L) Revolving Nose piece

  
• The Formula for specimen size is field diameter/fit number
• 1 micrometre (μm) is 1/1000 of a millimetre
• The formula to calculate magnification is objective lens power x eyepiece power = total magnification