I suggest that you use a cable release to trigger the camera set on the bulb shutter speed.
Barn door camera mount.
It is a simple alternative to attaching a camera to a motorized equatorial mount.
A barn door tracker is a camera attachment camera mount used to capture long exposures of night sky images.
If the software thinks it is at step zero when the two boards are not touching tracking error will result.
A key part of the assembly is the drive nut which couples the large gear to the threaded rod.
If you are using the hand turned method you will begin to turn the bolt.
The tracking action of the barn door mount is achieved by lifting the upper board at the correct rate by means of a motor driving a nut on a threaded rod.
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.
If you have motorized.
Should the mount lose synchronization i e.
It is a simple but effective way of eliminating the star trail effect of night sky photography without expensive equipment.
Position for the 1 2 inch bars for a 10 to 20 degree angle between the two boards.
Barn door tracking mount diagram.
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.