Ring T2 Sony E/NEX Bayonet with D52/M48 to T-2

Baader T-Ring to connect Sony ENEX DSLR cameras on the Astro T-2 system Represents the standard exact distance of 55.0mm from the front support surface of the T-ring to the image plane of the camera body forth On the camera side: Sony E NEX bayonet Telescope side: T-2 internal thread with 0.75mm pitch