Penelope Sanchez Exercise 4. Activity. Parts of a Compound Microscope 1. ___Eyepieces/Ocular lenses 2. __Nose Piece________________ 3. __Objective lenses_____________ 4. ___Mechanical stage___________ 5. Condenser________________ 6. __Base lens_________________ 7. ____Base___________________ 8. ____C-Mount_________________ 9. ___Trinocular Head _____________ 10. _Head_____________________ 11. __Arm Stand__________________ 12. ____Lock Screw_______________ 13. ___Coarse Focusing Knob________ 14. __Fine Focusing Knob___________ 15. ___Mechanical Stage Controls_____ 16. __Light Dimmer_______________ 17. ___On/Off Switch_____________ A&P Laboratory