Zeiss vertical illuminators iia and iib instructions . Available to purchase for immediate download. Below is an extract from the manual converted to text for a quick impression on the content. Zeiss vertical illuminators iia and iib instructionsVertical Illuminators II A and II BContents Beam path for bright-field illumination Beam path for dark-field illumination Functions of the diaphragms Vertical illuminator ll A Vertical illuminator II B Reflectors Objectives for incident light Lamp Accessories for microscopes for incident light Assembly of the unit Adjusting the vertical illuminator II A Adjusting the vertical illuminator ll B Adjusting the dark-field illumination (II A and n B) Reducing and eliminating reflections Care and handling