Baader Wide-T-Ring Nikon-Z with D52 to T-2iBaader Wide T Ring Nikon Z to connect Nikon Z cameras on the Astro T 2 system and the S52 dovetail All Baader Wide T rings have an S52 dovetail in addition to the inserted T 2 ring to use adapters to M48, M68 or the UFC filter changer The illumination of the camera chips improved significantly, mainly because of the larger clear aperture. On the camera side: Nikon Z bayonet Telescope side: S52 dovetail clamp incl. S52 T 2 internal thread with 0. 75mm