|Eyepiece Structure||Ultra Wide Series Eyepiece|
|Barrel Size||2" (50.8mm)|
|Angle Field of View||80 degree|
|Lens Design||5 groups/ 7 pcs|
|Threads||for 2" filters|
|Material||Glass & Metal|
This superb ultra wide angle eyepiece has 80 degree field of view, great comfortable for view directly of the deep space objects. Standard female thread to fit a 2 inch filter. the 7 Elements in 5 groups Design bring the great crystal clear images. 20mm focal length eyepiece give you lower magnification, would be good feeling when doing observation.
Note: This eyepiece is actually a dual eyepiece. If you unscrew and remove the lowest element, it becomes a 30mm eyepiece