DURST - Durst DA900 Notice GB

Complete operating manual for the DURST DA 900 precision enlarger, a professional instrument designed for enlarging negatives up to 2½ x 3½ inches (6.5 x 9 cm) including 70 mm film. The device features automatic focusing for two interchangeable lenses with focal lengths ranging from 28 mm to 105 mm. This comprehensive guide covers unpacking and component verification, full system assembly, and illumination setup using opal lamps with twin DANOCON 50 and 105 condensers. Detailed instructions address the automatic and manual focusing systems, with dedicated sections on selecting enlargement formats and magnification factors for various lens combinations. Specialized sections detail negative insertion procedures using AUTONEG and DUONEG negative carriers, focus variator operation for projecting onto non-planar surfaces, and giant enlargement techniques using floor projection. The manual describes available accessories including DUTUB extension tubes, URAN plate holders, colour filters, and copying equipment such as the URNOV copying cassette and RILU lighting system. A maintenance section provides guidance on proper care of optical components. Additional information covers complete specifications of all components and operating knobs, alongside a comprehensive inventory of specialized accessories designed to expand the enlarger's capabilities and versatility for various darkroom applications.