The nominal aperture of the dark field condenser is 1.36–1.25. It is used to create a contrast image of unstained, transparent samples that cannot be seen with the bright field microscope technique. Can be used with objectives with magnification greater than 20x, including oil immersion objectives.

Immersion oil must be used for both dry and oily objectives, otherwise the light will not reach the specimen. The MAGUS DF2 Condenser is placed on the microscope instead of the Abbe condenser, centered with two screws. The image will have the best possible contrast if the cover glass is 0.17 mm thick and the glass slide is 1-1.2 mm thick.

Compatibility
- MAGUS Bio 230B biological microscope
- MAGUS Bio 230BL biological microscope
- MAGUS Bio 230T biological microscope
- MAGUS Bio 230TL biological microscope
- MAGUS Bio 250B biological microscope
- MAGUS Bio 250BL biological microscope
- MAGUS Bio 250T biological microscope
- MAGUS Bio 250TL biological microscope
- MAGUS Lum 400 fluorescence microscope
- MAGUS Lum 400L fluorescence microscope

Specifications
- Aperture: 1.36–1.25
- Immersion medium: oil
- Usable lenses: 20х, 40х, 60х, 100х (oil)