Only two steps were generally required to put all the targets within the slits. The pointing was made faster by two reference pinholes corresponding to 2 relatively bright stars in the field. An inclined slitlet was employed to observe two objects close to each other. Spectra taken with moderately tilted slits will be easily reduced using the long-slit tasks of any reduction package. Multiobject spectroscopy will provide in this case membership information, so as individual stars will be securely placed in the HR diagram.
Galaxy clusters represent the most classical target for multiobject spectroscopy.
Observations of more distant clusters were prevented by the bad wheather. Good spectra of galaxies in A951 were obtained just with a 20 min exposure, before thick cirrus forced us to stop observations. The dome flat fields taken with the same mask shows the excellent quality of the slits. It is important that the masks are carefully dust-cleaned just before installation at the spectrograph. An example of comparison lamp spectra taken with the Th lamp and the LR-B grism.