![background image](http://html.mh-extra.com/html/national/400/400_instructions-manual_708346002.webp)
Rubber eyeshields
Eyepieces (ocular lens)
Knurled diopter
adjustment
Post locking
knob
Focusing knob
Post
Head of microscope
Objective lens
Incidental (top) illumination
(included on all models except #400)
Stage clips
Stage plate
Base
(Illustrated is #400TBL
having both incidental
(top) and transmitted
(bottom) illumination)
Fuse
Light control
switches
Power switch
405TBL series has 45
°
inclined head
Plain base on non-illuminated #400
Base on top illuminated #400TL