Levenhuk Ra ER20 WA 9 mm is a wonderful wide-angle eyepiece with a 9-mm focal length and an apparent field of view of 68°. Its 20-mm eye relief allows you to observe the celestial sphere in comfort when wearing glasses. All optical elements are made of special fully multi-coated glass that provides for clear and sharp views of observed objects.
With its 1.25'' barrel diameter, this eyepiece can still be used with a 2'' focuser with a special adapter. Therefore, this eyepiece can be used with a telescope of any brand and make. For even more comfortable observations, this eyepiece is fitted with a twist-up rubber eyecup. The eyepiece shell is made of lightweight aluminum.
|Exit Pupil||20mm diameter|
|Eyepiece 1||29.2mm diameter|
|Eyepiece Barrel Size||1.25" diameter|
|Eyepiece 1 Field of View||68°|
|Optical Design||8 elements in 6 groups, fully multi-coated|