A pioneer of Colombian conceptual photography, Jorge Ortiz explores urban landscapes, often using light and time as his primary tools. In the 1970s, he began to experiment with light and developing processes, which resulted in his early black-and-white series Cables (1977) and Boquerón (1979-81). In Boquerón (lot 9), shooting in five-minute intervals, he systematically photographs the celestial changes in the horizon near Medellín, meticulously documenting the time and place between each shot and noting the differences and similarities along the horizon line. In Cables (lot 10), Ortiz continues with his visual analysis, but this time, he turns his camera up, shooting the lines of the power cables that crisscross above Bogotá. Ortiz’s work has been exhibited internationally, including Havana Biennial, Bienniale of Sydney and Museo de Arte Moderno de Bogotá.