It takes an optical-mechanical planetarium projector to simulate a starry sky that is really brilliant, one that captivates and inspires the audience. At the same time, no one wants to forgo the flexibility of a digital planetarium. For small and medium-sized domes, ZEISS offers the no-compromise combination of analog star projection with SKYMASTER ZKP 4 LED and digital fulldome projection with VELVET LED. No compromise means that the digitally projected imagery will not spoil the brilliance of the stars on the night sky and that the digital and analog planetarium projections will always be in perfect register.