This product is new - No internal or external packaging
By means of a erecting eyepiece you can put the image upright again, so that you can also use the telescope for observations on the land. You can also view birds or other objects with a telescope. You simply place the reversing prism into the eyepiece holder and place the eyepiece in the erecting eyepiece.
Medium focal length (10-20mm) eyepieces provide medium power magnifications and are best for observing larger deep sky objects and the full disc of the moon on most average telescopes.- 10MM
- 20MM