Expansion Ring T-2 /48mm with 2.5mm optical path length (BP29)

Baader Planetarium

Expansion Ring T-2i /2"a with 1mm optical path length (BP28)

Adapter Ring 2" outer thread to T-2 internal thread Advances T-2 male on 2" male Only 1mm optica

Baader Planetarium

Reducing-Ring 2"i / T-2a with 1.5mm optical length (BPR2T2-15)

Low profile adapter 2"i to T-2a, featuring just 1.5mm optical length changes a 2" SC (50,8mm

Baader Ultra Short SCT to T-Adaptor, 9mm optical length (BPSC2T2)

This adapter allows you to connect your T-2 thread (42mm) accessories to the larger SCT thread (2”).

Baader Planetarium

2"/2" Inverter Ring with 48mm Filter Thread (BP2/21)

Converts 2" female into 2" male thread Internal M48 Filter thread for 2" filter

Baader Planetarium

T-2/T-2 Inverter Ring (BP26)

Changes a T-2 female into a T-2 male thread Optical path length is zero. Free of reflections