Use one objective to achieve maximum contrast in all your object's structures – during standard monitoring as well as while finding answers to morphological questions.
Switching is easy with just a simple diaphragm change.
You profit from an economic 2-in-1 solution and a new area of application.
Pictures (left phase+, right phase-): Thick cell areas show more details with the negative phase contrast. MDCK cells (dog), R. Nitschke, Life Imaging Center, University Freiburg, Germany.