This adapter turns any 50mm Skywatcher/Orion straight-through finderscope into a guidescope (must be a straight-through finderscope, not right-angle).
You simply unscrew the eyepiece assembly at the rear, screw in this adapter in its place and that gives you a T-thread exposed on the rear of the finderscope to which you can attach any guide camera with a T-thread (directly) or via any other adapter you have for it. For example, the QHY5 guide camera (I'm also selling one of those) has a T-thread and will screw straight on.
The adapter is sized so that the focal plane of the guide camera will be in the focal range of the finderscope. You achieve focus just as you do for visual with your finderscope.
To buy from the UK (the only place you can get them) would cost around $55. I'm offering this for $35 delivered Australia-wide - it's essentially in brand new condition.
