Opticron Tripod Mount for Binoculars with 50mm+ Objective Lens Twin 1/4" thread connections to tripod, hide clamp or car window mount 1/4" screw thread to binoculars fitted with suitable tripod adapter socket Thumb wheel bolt for easy tightening to binocular Suitable for use with porro prism binoculars with 50+mm objective lens. Suitable for use with observation or large astronomy binoculars