Wilton Windmill 30.10.18 - 01

The mill has four sails in total; two patent (these are the slatted sails which can be quickly activated) and two common canvas sails, which have to be set before the mill starts to turn. The function of the fantail is to move the cap on its bearings so that the sails can pick up the wind, if there is any.
Nikon D700 + Nikkor 20mm f/3.5 AI-S lens.