AbstractA stable measurement setup is fundamental for any successful measurement. A major cause of frustration and error is the need to continuously readjust optomechanical equipment because of continuous instabilities. But first decisions have to be made about which components to use. Detailed measurements of fiber parameters like e.g. an effective numerical aperture allow a better understanding which other fiber optic components are suitable for the application at hand. In‐depth knowledge about the different parameters is key for this procedure. The online product configurators on the new Schäfter+Kirchhoff website provide this information quickly and easily and help narrow down the search to the most relevant choices.