Why does the Baader Sony E/NEX T-Ring have three different connection types?
The three connections (T-2, M48, and S52) provide maximum flexibility and help prevent vignetting. You can use the standard T-2 for universal compatibility, step up to M48 for use with 2" filter threads and full-frame correctors, or use the largest S52 dovetail for a rigid, wide-aperture connection to other Baader accessories like the Universal Filter Changer (UFC).
Will this Baader T-Ring work with my Sony a6400 APS-C camera?
Yes, absolutely. This T-Ring is compatible with any camera that uses the Sony E/NEX bayonet mount, including both full-frame (Alpha 7/9 series) and APS-C (Alpha 6000 series) models. While vignetting is less of a concern with smaller APS-C sensors, the ultra-short 8.3mm optical path is still highly beneficial for use with reducers and correctors.
How do I attach the Baader E/NEX T-Ring to a standard 2" focuser?
You have two main options. You can thread a standard M48-to-2" nosepiece into the T-Ring's M48 thread. For the widest possible light path and to achieve the full 46mm clear aperture, the recommended accessory is the Baader S52/2" barrel (#2958551), which clamps securely onto the T-Ring's outer S52 dovetail.
I'm using a HyperStar on my Celestron EdgeHD 8 with a Sony A7S. Is this the right Baader adapter?
Yes, this is the ideal adapter for that exact setup. The HyperStar system has extremely limited backfocus, and this T-Ring's minimal 8.3mm optical length is specifically designed for such applications. Its wide-aperture design also ensures the fast f/2 light cone from the HyperStar fully illuminates your A7S's full-frame sensor without vignetting.
What is the main benefit of the 8.3mm optical length on this Baader T-Ring?
The primary benefit is compatibility with optics that have very short backfocus requirements. Many flatteners, reducers, and coma correctors require a precise sensor distance (typically 55mm). A standard, thicker T-ring can consume too much of that budget, leaving no room for filter wheels or off-axis guiders. The 8.3mm length of the Baader T-Ring preserves that critical distance for other accessories.
Can I use filters with the Baader Sony E/NEX T-Ring?
Yes. The most effective way is to integrate the T-Ring with the Baader Universal Filter Changer (UFC) system using the optional UFC S52 dovetail adapter (#2459119). This allows you to place a filter slider or wheel directly in front of the camera. Alternatively, you can use a separate M48-threaded filter drawer between the T-ring and your telescope, provided you have sufficient backfocus.
