``Hier stehe ich und kann nicht anders.''When ALIS began operating, an ``aiming-system'' appeared as desirable. This was planned to consist of a simpler white-light video-rate camera intended mainly to assist the ALIS operator. Two old low-light TV-cameras were used for this purpose at the ALIS operations centre. However it was always desired to have real-time digital colour images available, even if ALIS was operated from a remote place. For many years this appeared as impossible or too expensive. Around 1999 commercially-available digital still- and video colour cameras began to reach the required sensitivity. This initiated a study, mainly intended to replace the present all-sky imager in Kiruna, but also with interesting implications for ALIS. This appendix briefly describes these efforts.
It is, however, of great importance to note that the imagers discussed here are in no way comparable to the ALIS imagers. A colour CCD camera can never be used for absolute measurements of column emission rates as it contains its own colour filters. On the other hand, the colour cameras can be of great value for providing overview information of the morphology and dynamics. Also, colour images and movies of auroral phenomena tend to be much more appealing for public outreach purposes, compared to the more scientifically useful, but ``unexciting'' monochromatic images.