This year’s summer school, held in Brno in September 1–11, 2015 attended by advanced MSc’s, PhD students, Postdocs and senior astronomers presented modern instruments available for observations in the Optical and IR domains, together with their scientific tasks and performances. Primarily, the ESO instruments (ESO – European Organization for Astronomical Research in the Southern Hemisphere), as well as those available through the Opticon Access Program were features.