A device is provided for processing hard-to-access workpieces by means of an imaging optical path as well as a corresponding method for laser processing by means of this device, comprising a relay optical system with an optical axis passing through the relay optical system and a focusing unit arranged behind the same seen in the optical axis in the propagation direction of the imaging optical path, with a plurality of optical elements for generating a third focal length, as well as a beam scanner arranged before the first relay optical group seen in the propagation direction of the imaging optical path, which scanner is provided both as an entrance pupil for the imaging optical path entering the first relay optical group and at least for deflecting the imaging optical path in relation to the optical axis.