Website Special - FREE Agena plastic bolt case / storage container included with this eyepiece (a $6 value)!
Levenhuk Ra ER20 WA 18 mm Eyepiece
Wide-angle eyepiece. Focal length: 18 mm. Field of view: 68°
WA in the Levenhuk Ra ER20 WA 18 mm Eyepiece model name stands for Wide-Angle, and the field of view of this model equals 68 degrees. This model will be especially useful for those who wear glasses, since it has a long eye relief of 0.8 inches and comes with a twist-up rubber eyecup. As with all other eyepieces in the Levenhuk Ra series, Levenhuk Ra ER20 WA 18 mm Eyepiece has a fully multi-coated optics and provides high-quality views. This eyepiece has a focal length of 0.7 inches and is lightweight due to an aluminum shell. Another good feature of this model is the possibility to attach it to almost every telescope with a focuser barrel diameter of 1.25'' or 2'' (using 1.25'' to 2'' adapter in the latter case).
Focal length, in: 0.7
Eyepiece diameter, in: 1.2
Exit pupil diameter, in: 0.8
Barrel diameter: 1.25"
Apparent field of view, °: 68
Optical design: 8 elements in 6 groups, fully multi-coated
|Eyepiece Series||Levenhuk Ra ER20 WA|
|Barrel Size||1.25" (31.7mm)|
|Apparent Field of View (Mfg Specified)||68°|
|Eye Relief (Designed)||20mm|
|Filter Threads||Standard 1.25" Filter Thread (M28.5 x 0.6)|
|Barrel Safety Recess||Tapered barrel|
|Barrel Type||Tapered barrel|
|Protective Plastic Storage Container||Yes - Free Agena Eyepiece Container|
|Protective Plastic Storage Container Size||Agena 65x80mm|
|Rubber Eye Guard||Yes (Twist Up)|
|Weight||12.8 oz (362.9 g)|
|Country of Manufacture||China|