

The SV135 is stiff enough not to accidentally change focus and smooth enough to rotate without having to hold the telescope lenses base with your other hand. 7-21mm which will give you a wide range of magnification options. This is especially useful in lunar observing where one short barrel twist at a time will bring you closer and closer still to the Moon’s craters and mountain ranges to the point where you get the feel of looking down at the lunar surface from an orbiting space station. SV135 7 mm to 21mm adjustable focal length;SV135 7-21mm zoom eyepiece equivalent to multiple eyepieces ;obtain higher magnification with short focal length;It could bring you a better observation experience in a comfortable situation with high-contrast imaging. 18mm - 16.3mm comfortable eye relief; especially for eyeglass wearers ;designed primarily for viewing landscapes and astronomical observations of lunar surfaces; planets; nebulae; clusters; and diffuse nebulae. Fully multi-coated Premium eyepiece;The true fully multi-coated Premium eyepiece with superior edge and center sharpness than normal PLOSSL eyepieces; 6-Element 4-Group premium optical design for superior optical performance. Standard 1.25" eyepiece;Equipped with a precision-made standard 1.25-inch lens barrel that is compatible with any telescope that accepts 1.25-inch eyepieces; Rubber eye guard for comfortable viewing and blocking stray light. A cost-effective eyepiece;Full metal body; fine appearance; 40 degree - 57 degree wide angle field of view; high brightness observation is very comfortable ;you will obtain more details that you have never seen before. |
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| Model | SV135 | SV135 | SV135 |
| Focal length | 7-21mm | 7-21mm | 7-21mm |
| Field of view | 52~36° | 57~40° | 60~40° |
| Eye Relief | 13mm - 14mm | 18mm - 16.3mm | 13mm - 15mm |
| Lens structure | 3 groups/ 5 pcs | 4 groups/ 6 pcs | 4 groups/ 7 pcs |
| Barrel Size | 1.25" | 1.25" | 1.25" |
| Coatings | Fully Multi-Coated | Fully Multi-Coated | Fully Multi-Coated |
| Rubber Eye Guard | Yes | Yes | Yes |
| Meterial | Metal +Optic Glass | Metal +Optic Glass | Metal +Optic Glass |
| Color | Black | Black | Black |
| Thread Size | M28.5*0.6 | M28.5*0.6 | M28.5*0.6 |

