This wide T-ring from Baader is used to connect Nikon DSLR cameras onto the Astro T-2 system. All Baader wide T-rings have an S52 dovetail along with the inserted T-2 ring, allowing for the T-ring to be modified to an M48 female thread using the S52 / M48 adapter or to use the S52 barrel without the T-2 reduction. With the S52 / M68 adapter, the wide T-ring can be directly attached to an M68 male thread, securely fastening your camera to the widest possible aperture.
All Baader wide T-rings can also be adapted to a Universal Filter Change (UFC) with the optional Baader UFC S52 dovetail camera adapter, allowing you to change different filter sizes directly in front of the camera sensor.
Additionally, the illumination of the camera chips is significantly improved with the wide T-ring, due to the larger clear aperture.
Threads on the camera side are Nikon bayonet and threads on the telescope side are S52 dovetail clamp including S52 / T-2 internal thread with 0.75 mm pitch.