[90 Degree & 360 Rotating] No more crouch, dirty knees and sore neck in awkward positions! This 90-degree polar scope viewer makes polar alignment easier and more comfortable. Multiple click-stop eyepiece positions to provide a variety of viewing angles without changing its center object. [Well Constructed & Clear Image] High quality optics for clear and shape images, the built-in amici prism serves up the same image orientation as the polar scope. [Widely Compatibility] Compatible with any polar scopes with an eyepiece of a contour of a cylinder which has a height greater than 22mm and a diameter between 27.3 and 30.3mm. [Built-in Diopter] An integrated diopter is controlled by rotating the viewfinder's barrel to focus your viewing area; It helps clear viewing for different eyesight. Colour:Black Material:plastic Package Contents: 1 x Right Angle Viewfinder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.