Schneider Industrial Optics 21-1001978 TURQUOISE 1.9/10mm C * TURQUOISE 1 inch Format Lenses Visible Corrected (Broadband Coated for 400-700nm or 700-1000nm) These larger format lenses are constructed with our proven compact robust barrel. Focus is achieved by rotating the main lens barrel via fine internal thread with locking collar to secure focus, and the iris setting is secured by a thumb screw. The lenses have a front thread to accept filters, while the 10mm lenses must use a filter adapter. Image Circle: 16mm, Filter Size: M62x0.75*, Standard LensTURQUOISE compact lenses are tested to DIN standards to ensure they meet stringent environmental requirements. These tests check the durability of the compact lenses, their resistance to temperature changes and their ability to withstand shock tests and sinusoidal vibration. This ensures that the industrial lenses are up to the task in demanding industrial applications such as machine vision or automated optical inspection, providing consistent performance and reliability over time.