8-24mm Focal LengthJust twist the zoom eyepiece housing to change the focal length,and you can get variety of viewing magnification powers. Ideal for locating an object at low magnification, then quickly zooming in to higher magnification for closer inspection, all without changing eyepieces. Twist-up EyecupsExceptionally long 18-19.5mm eye relief range and twist up eyecups allow eyeglass wearers to enjoy the entire field of view without needing to remove their glasses. Safety UndercutSleek black barrel with safety undercut to reduce the possibility of the eyepiece slipping out of the telescope or diagonal. Features:
Package Includes
|
Model | SV135 | SV170 | SV171 |
Focal length | 7-21mm | 10-30mm | 8-24mm |
Eye Relief | 18mm - 16.3mm | 17-18.5mm | 18-19.5mm |
Zoon Type | Linear | ||
Lens structure | 6PCS / 4group | 5 -Elements/-3Groups | 7-Elements/4-Groups |
Interpupillary Dist. | 15mm | ||
Barrel Size | 1.25" | 1.25" | 1.25" |
Field of view | 57° ~ 40° | 33°-51° | 38°-56° |
Coatings | Fully Multi-Coated-Green | Fully Multi-Coated | Fully Multi-Coated |
Rubber Eye Guard | Yes | ||
Blackened Lens Edges | Yes | Yes | |
Barrel Safety Recess | Yes | Yes | |
Eyecups Meterial | Metal | Metal | Metal |
Eyecups | Twist-Up | Twist-Up | |
Thread Size | M28.5*0.6 | M28.5 x 0.6 | M28.5 x 0.6 |
Net Weight | 133g / 4.67oz | 198g / 6.98oz / 0.44lb | 300g / 10.58oz / 0.66lb |