The eyecup is a small but important accessory to the eyepiece of the microscope, which makes working more comfortable. It is made of soft rubber and must be fitted to the eye lens. The conical shape and the opaque material protect the eyes from excessive light.

The ECF2 model can be mounted on the eyepieces in the following microscope sets
- MAGUS Bio 250B biological microscope
- MAGUS Bio 250BL biological microscope
- MAGUS Bio 250T biological microscope
- MAGUS Bio 250TL biological microscope
- MAGUS Bio V300 biological inverted microscope
- MAGUS Bio V350 biological inverted microscope
- MAGUS Lum 400 fluorescence microscope
- MAGUS Lum 400L fluorescence microscope
- MAGUS Lum V500 fluorescence inverted microscope
- MAGUS Lum V500L fluorescence inverted microscope
- MAGUS Metal 600 metallographic microscope
- MAGUS Metal 600 BD metallographic microscope
- MAGUS Metal 630 metallographic microscope
- MAGUS Metal 630 BD metallographic microscope
- MAGUS Metal 650 metallographic microscope
- MAGUS Metal 650 BD metallographic microscope
- MAGUS Metal V700 metallographic inverted microscope
- MAGUS Metal V700 BD metallographic inverted microscope
- MAGUS Pol 800 polarizing microscope