Levenhuk Ra 1.25" ER20 Wide Angle Eyepiece - 18mm
This item has been discontinued by Agena and we no longer offer this.
Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
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
Shell: aluminum
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
Shell: aluminum
| Manufacturer | Levenhuk |
|---|---|
| Eyepiece Series | Levenhuk Ra ER20 WA |
| Focal Length | 18mm |
| 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) |
| Coatings | Fully Multi-Coated |
| Lens Elements | 8 |
| Lens Groups | 6 |
| Barrel Type | Tapered barrel |
| Protective Storage Container Included | Yes - Free Agena Eyepiece Container |
| Protective Plastic Storage Container Size (Sold Separately) | Agena 65x80mm |
| Rubber Eye Guard | Yes (Twist Up) |
| Warranty | 6 months |
| Weight | 12.8 oz (362.9 g) |
| Country of Manufacture | China |
| Exit Pupil | 20mm |
| Coatings | Fully Multi-Coated |
| Eye Relief | 20mm |
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
Shell: aluminum
| Manufacturer | Levenhuk |
|---|---|
| Eyepiece Series | Levenhuk Ra ER20 WA |
| Focal Length | 18mm |
| 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) |
| Coatings | Fully Multi-Coated |
| Lens Elements | 8 |
| Lens Groups | 6 |
| Barrel Type | Tapered barrel |
| Protective Storage Container Included | Yes - Free Agena Eyepiece Container |
| Protective Plastic Storage Container Size (Sold Separately) | Agena 65x80mm |
| Rubber Eye Guard | Yes (Twist Up) |
| Warranty | 6 months |
| Weight | 12.8 oz (362.9 g) |
| Country of Manufacture | China |
| Exit Pupil | 20mm |
| Coatings | Fully Multi-Coated |
| Eye Relief | 20mm |