DURST - Durst DA900 Notice GB

Complete operating manual for the DURST DA 900 precision enlarger, a professional instrument engineered for enlarging negatives up to 2½ x 3½ inches (6.5 x 9 cm) including 70 mm film. This comprehensive workshop guide covers unpacking and component verification, full system assembly, and illumination setup with opal lamps paired with twin DANOCON 50 and 105 condensers. Detailed instructions address both automatic and manual focusing systems, with two interchangeable lenses spanning 28 mm to 105 mm focal lengths. The manual walks you through negative carrier operation using AUTONEG and DUONEG systems, magnification factors for different lens combinations, and focus variator techniques for projecting onto non-planar surfaces. Specialized sections cover giant enlargement and floor projection methods, alongside descriptions of expansion accessories such as DUTUB extension tubes, URAN plate holders, and colour filters. The guide includes practical guidance on the URNOV copying cassette and RILU lighting system for copy work, maintenance procedures for optical components, and a full component inventory with specifications. This service manual serves as the definitive technical reference for setting up, operating, and maintaining the DA 900 enlarger across a wide range of darkroom applications.