Sunquest sundial

Adjustable for latitude and longitude, the Sunquest's gnomon automatically corrects for the equation of time allowing it to tell clock time.

The Sunquest sundial utilizes a cast aluminum gnomon, the shape of which is related to the analemma.

When turned to face the sun, the gnomon casts a curved ribbon of sunlight onto the time-scale arc, correcting for mean time.

The Sunquest sundial won Sky & Telescope magazine's "Sundial of the Year 2000" competition in 1966.

[1] The Sunquest Sundial has been featured in several other publications, including Sundials: The Art and Science of Gnomonics,[2] Scientific American[3] and Sundials: Their Theory and Construction.