You are bidding on a brand new high quality Telescope for commodore 、 marine and seafaring. It has glass lenses for longer life and quality vision. The filed of view can be adjusted for clear vision. It has the facility of focusing which can be adjusted to individual eyelight. Fully coated optics.Gorgeous Cupronickel 30x40mm telescope. Features a tri-fold Cupronickel housing with a leather grip. Close Lengh:130mmOpen Lengh: 286mmMinimum focusing distance: 10mExit pupil diameter: 1.2mmExit pupil distance: 17mm