Siderostats/Coelostats/Heliostats We offer specially designed instruments for various purposes, like solar science projects or interferometry with several linked systems. Also enhanced configurations to minimize vignetting are possible. As in our other telescopes both modern and very fast direct drives as well as classical friction drives are available. Seeing Monitors Our DIMMs are automatically, remotely working systems for determining the seeing by measuring the differential image motion of bright stars. These systems are used at operating observatories for permanent monitoring of the image quality, or with mobile stations for site testing for new telescopes which becomes more and more important in recent and future major projects. Automatic, completely retractable enclosures We provide completely or partially retractable enclosures in various versions and sizes, from about 1 m up to over 6 m diameter. Observing stations A station with totally removable roof and adjacent observer's cabin we use at the test site on our company's premises.