SkyWatcher 45-degree erect-image diagonal, barrel size 31.8 mm. For 31.8 mm eyepieces. Allows terrestrial observation with astronomical telescope. Not suitable for newtonian optical tubes.
Meade Model 933 Image Erecting Prism for ETX-60, ETX-70 and ETX-80 Models. Produces a correctly oriented image and convenient 45° observing angle for terrestrial observations. A great item for a home with a view or nature watching.