Baader Wide-T-Rings

Maximum free aperture & extra backfocus

Optimized for modern full-frame sensors

Standard T-rings maintain the 55 mm flange focal distance used in photography, but the M42x0.75 connection thread limits the light path: Vignetting occurs with fast optics, especially on full-frame sensors. The Baader Wide-T-Rings were developed especially for Astronomy, where every millimeter is often extremely important: With an overall length of only 8.3 mm and their larger inner diameter, they utilize the complete aperture of your telescope and at the same time provide you with valuable back focus - yielding space for filter wheels, off-axis guiders or other accessories. The result is uniform edge-to-edge illumination without any loss of brightness, which is a particular advantage with mirrorless system cameras.

S52 adapter system – a rigid connection without any loss of aperture

The removable T-2 thread (M42 × 0.75) of each Wide-T-Ring exposes the S52 dovetail connection. This allows you to use your camera with the 2" Nosepiece to S52 (#2958551 , € 41,- ) on any 2" focuser – and even use mounted 2" filters – without additional components.

With the Adapter S52a to M48i (#2958552 , € 25,- ) (already included in the Sony E/NEX ring) it is easy to connect the M48 system - perfect for tilters, filter wheels or other accessories.

The Adapter M68a to S52a – for Wide-T-Rings (#2458252 , € 46,- ) , which creates a direct connection to M68 external threads, allows even greater flow rates. And via the UFC Camera-Adapter S52a – Optical height: 2mm (#2459119 , € 30,- ) you can adapt Wide-T-Rings to a UFC-filter drawer in order to change filters of different sizes directly in front of the sensor, without any loss of opening.