OBJECT

Star trails behind a XVI Century Watch Tower. With a diameter of 3.3 meters these towers were built to watching the vicinity. There is no more than two kilometers between some of these towers for communicating messages.

The image was published on Sky & Telescope magazine Issue July 2015

TECH  DATA

Optics:   Canon 

Camera: Canon 70D DSLR

Exposure details:  multiple 60 second exposure composition