Solar Magnetometry with the dutch open telescope

The Dutch Open Telescope (DOT) has become op- erational at the Roque de los Muchachos Observa- tory on La Palma. The rst image sequences taken with this innovative telescope demonstrate its capa- bility for tomographic high-resolution imaging of the magnetic topology of the solar atmosphere up to the transition region over the large eld of view permit- ted by consistent speckle restoration. We review the science needs for such imaging and describe the DOT solution to the problems posed by the earth atmo- sphere and the solar physics niche lled by the DOT.