The Barn Door Tracker

The double arm design was first described in an article by dave trott published in the february 1988 issue of sky telescope magazine.
The barn door tracker. A barn door is a specialized type of equatorial mount. Motorized barn door tracker the barn door mount gets it s name from the fact that it s basically a wooden board with a door hinge. A barn door tracker also known as a haig or scotch mount is a device that slowly rotates a camera allowing it to track the stars so it can take long exposure photographs of the night sky. A followup appeared in the april 1989 issue.
A barn door tracker is a camera attachment camera mount used to capture long exposures of night sky images. A barn door tracker also known as a haig or scotch mount is a device used to cancel out the diurnal motion of the earth for the observation or photography of astronomical objects. It is a simple but effective way of eliminating the star trail effect of night sky photography without expensive equipment. It is a simple alternative to attaching a camera to a motorized equatorial mount.
While there are many commercial mounts to track the sky here we will discuss a simple way to construct a mount that will costs less than 100 complete with a motor to drive the screw.