Blown-up portion of the spectra of the eight Ap stars in which the presence of resolved, or marginally resolved, spectral lines is reported for the first time here, including the mean magnetic field modulus diagnostic line Fe IIλ 6149 Å. The CAOS spectra are plotted in black; the SALT-HRS spectra in sky blue; and the HARPS-N spectra in orange. For three stars, spectra were obtained both with HARPS-N and with CAOS. The two spectra of each pair are shown together, to illustrate the value of achieving the highest possible resolution to diagnose the magnetic field. The derived values of ⟨B⟩ appear in the bottom right corner of each panel; the CAOS spectra of BD+46 570 and of HD 96571 have insufficient resolution to determine ⟨B⟩ in these stars. The wavelengths are in the laboratory reference frame. The broad emission-like feature in the CAOS spectrum of BD+46 570 is due to an instrumental glitch. The Zeeman patterns of the lines seen in the considered spectral range are illustrated in Fig. 3.