Abstract: Time-of-flight mass spectrometer (1), comprising an extractor module (3) for accelerating ionized substances by means of an electric field and for focusing the ionized substance onto a focusing axis (6) by means of at least one ion lens (32), a deflector (4) for deflecting the ionized substances, a drift path (7) as well as a detector (5) for detecting the ionized substance, the extractor module (3) being displaceably disposed relative to the detector (5), and the focusing axis being centered, in a first position, on the detector surface (51), while the focusing axis (6), in a second position, is positioned outside the detector surface (51). The invention allows in particular the spectra of neutral and charged particles to be measured independently from one another.