SIRUI BA-1 Tripod Adapter for Binoculars With the SIRUI BA-1 binocular adapter, it is quick and easy to mount binoculars on a tripod. For this purpose, the 1/4 inch screw of the adapter is screwed into the tripod connection (center drive) of the binoculars. This allows the binoculars to be used comfortably for long periods of time without tiring the arms or causing the image to wobble.Ideal for ornithologists, hunting, or for landscape and wildlife observation.The tripod adapter is made of sturdy aluminum and it is Arca-Swiss compatible. It can be used on common tripod heads. The adapter is also the perfect complement to the SIRUI BA-WM car window tripod.