Carl zeiss ph-diaphragm carrier operating instructions. Available to purchase for immediate download. Below is an extract from the manual converted to text for a quick impression on the content. Carl zeiss ph-diaphragm carrier operating instructionsZEISS CARL ZEISS 7082 Oberkochen West GermanyThis diaphragm makes it possible to produce phase contrast illumination for medium-power objectives which have the additional designation “Ph 2”. A phase contrast condenser is not necessary. The following parts are needed on a STANDARD microscope: compact illuminator B or integral illuminator HAL phase contrast objective Ph 2 (8.9. Achromat 4ox Ph, Achromat 63x Ph), condenser 0.9 or 1.3 whose front lens can be swung out for phase contrast auxiliary lens KL (46 51 35) and centering telescope (46 48 20).