# Connections and special features of Omegon rotators

The three CAA rotators have slightly different characteristics compared to the two Pro rotators. See the table below for details:

<table border="1" id="bkmrk-modell-innengewinde-" style="border-collapse: collapse; width: 100%; height: 195.014px;"><colgroup><col style="width: 29.3174%;"></col><col style="width: 20.0217%;"></col><col style="width: 22.286%;"></col><col style="width: 28.364%;"></col></colgroup><tbody><tr style="height: 46.5057px;"><td style="height: 46.5057px;">**Model**</td><td style="height: 46.5057px;">**Internal thread (usually for telescope)**</td><td style="height: 46.5057px;">**External thread (usually for camera/filter wheel)**</td><td style="height: 46.5057px;">**Optical length**</td></tr><tr style="height: 29.7017px;"><td style="height: 29.7017px;">CAA T2 (#87375)</td><td style="height: 29.7017px;">M42\*0.75</td><td style="height: 29.7017px;">M42\*0.75</td><td style="height: 29.7017px;">13.5mm</td></tr><tr style="height: 29.7017px;"><td style="height: 29.7017px;">CAA M48 (#87376)</td><td style="height: 29.7017px;">M48\*0.75</td><td style="height: 29.7017px;">M48\*0.75</td><td style="height: 29.7017px;">14mm</td></tr><tr style="height: 29.7017px;"><td style="height: 29.7017px;">CAA M54 (#87377)</td><td style="height: 29.7017px;">M54\*0.75</td><td style="height: 29.7017px;">M54\*0.75</td><td style="height: 29.7017px;">14mm</td></tr><tr style="height: 29.7017px;"><td style="height: 29.7017px;">Pro M56 (#86756)</td><td style="height: 29.7017px;">M56\*0.75</td><td style="height: 29.7017px;">M56\*0.75 + 2" Plug diameter</td><td style="height: 29.7017px;">  
</td></tr><tr style="height: 29.7017px;"><td style="height: 29.7017px;">Pro M82 (#86757)</td><td style="height: 29.7017px;">M82\*1.0</td><td style="height: 29.7017px;">M56\*0.75 + 2" Plug diameter</td><td style="height: 29.7017px;">  
</td></tr></tbody></table>

The **Pro Rotators** fit perfectly on the 2" focusers #85063, #85065 (M56) and the 3" focusers #85064 and #85066 (M82).

Only adjust the small Allen screws if the rotator is noticeably too easy or too difficult to turn. They should be adjusted very precisely.

The **CAA Rotators** are designed for light to medium-weight accessories and can be mounted wherever the connection and optical length allow.