KFM-1100 Auto MeterDescription Ambient Light Readings The KFM 1100 shutter speed can be selected in a range from as long as 30 minutes to as fast at 1 8000 of a second (This range is selectable in full stop, _ stop or 1 3 stop increments). The light reading is displayed on the meters LCD window as both digital and analog data. If you wish to select a different shutter speed after a reading is taken, the aperture reading will automatically change accordingly. The KFM