It’s a zoom to focus. With the Source Four Fresnel, you get that timeless Fresnel light in a 21st-century fixture. ETC’s innovative mechanical design has simplified the focusing for you. Whatever physically awkward spot you’re working in, we make it easier for you to adjust the fixture from spot to flood, with a full-sized zoom knob you can get a real grip on. We’ve also engineered the fixture-housing to eliminate light leaks and minimize spillage.