Bresser Phase Contrast set for Transmission Microscopes. The phase contrast set contains four different irises four different phase contrast objectives (10x 20x 40x 100x oil) and three colour filters. A collimating aid allows easy aligning. This method is especially suitable for non-stained low contrast samples (epithelium cells amoeba white blood cells) and will also help with visibility of bacteria. Therefore it is used in cell culture and life science where color staining cannot be used. Specifications for Bresser Phase Contrast set for Transmission Microscope: Manufacturer: Bresser Additional Features: With acrhromatic objectives Magnification: 4 x Magnification Type: Fixed Package Contents: Bresser Phase Contrast set for Transmission Microscope Bresser 59-42750: Phase Contrast set for Transmission Microscopes