'''Then:'''
2. On the instrument PC, '''select the required filter'''. If you need flats in a variety of filters, be sure to cycle through them in the correct order (e.g. UBVRI during evening twilight; IRVBU in the morning). This also applies if you need a range of prebin settings (i.e. start with low binning in the evening; high to low binning in the morning).
3. You can easily take a minimum of 15 flats in each filter/prebin setting with SHOC; Sibonise has longer readout times.