From a side view this adaptor looks like a standard 1.25" to 2" eyepiece adaptor but from above or below things look very different! The off-axis positioning of the 1.25" hole is designed to allow CCD auto-guiders (or other cameras) to be rotated in the 2" eyepiece holder and progressively sample the whole 2" eyepiece field rather than just the centre.
Normally if your auto-guider scope is supported in rings, you would need to either fiddle with the rings or change the primary scope´s pointing position not very convenient. This simple modification to a standard adaptor lets you easily investigate the whole field of view of your scope by simply rotating the adaptor very convenient. Surprisingly the adaptor allows nearly 16mm of lateral movement across the field. Obviously this product is only suitable for use with scopes fitted with a 2" focuser. The off-axis adaptor has two brass chrome-plated lock screws, and is supplied with an additional two hard nylon thumb screws to allow greater slippage control if required.
The adaptor nosepiece has an anti-slip recess and is threaded for standard 2" filters. The adaptor is CNC precision-machined from aluminium and has a black anodised finish.