The Heliodon is designed with a large work-table - 800x800mm - for sunlight studies of block models or large scale models of building elements.
Scales are provided for orientation, latitude, time of day and season.
The price of a heliodon, excluding light source:
Working drawings for the Heliodon can be purchased. A comprehensive set of detailed drawings together with hints and support on how to carry out some operations, and instructions for use: £250.