Sichuan Tontube Technology Co.,LTD
Sichuan Tontube Tech Co.,LTD, One of the best top-rated optics manufacturer in the new century!
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Stargazing Astronomical Telescope ED Lens 20-60x60 Spotting Scope
| POWER | 15X-45X | 20X-60X | 20X-60X | 25X-75X | |||||
| OBJ. LENS DIA. | mm | 60MM | 60MM | 80MM | 80MM | ||||
| TYPE OF PRISM | Type / Material | Porro/Bak4 | Porro/Bak4 | Porro/Bak4 | Porro/Bak4 | ||||
| NUMBER OF LENS | Pieces & Groups | 8Pcs/5Groups | 8Pcs/5Groups | 8Pcs/5Groups | 8Pcs/5Groups | ||||
| LENS COATING | Fully Multi Coated | YES | YES | YES | YES | ||||
| EXIT PUPIL DIAMETER | mm | 4.-1.3MM | 3-1 MM | 4-1.3MM | 3.2-1.05MM | ||||
| EXIT PUPIL DIST. | mm | 15-12MM | 13.5-11MM | 13.5-11MM | 13.5-11MM | ||||
| FIELD OF VIEW | Angel | 2.5-1.2° | 1.8-0.9° | 1.9-0.95° | 1.4-0.7° | ||||
| Ft/1,000Yds | 129-63Ft/1000Yds | 93-48Ft/1000Yds | 99-49.5Ft/1000Yds | 99-49.5Ft/1000Yds | |||||
| M/1.000M | 43-21M/1000M | 31-16M/1000M | 33-16.5M/1000M | 14.5-12M/1000M | |||||
| MIN. FOCAL LENGTH | M/Ft. | 8M | 8M | 10M | 10M | ||||
| RELATIVE BRIGHTNESS | 16-1.7 | 9-1.0 | 16-1.7 | 10-1.1 | |||||
| WATER PROOF | Yes / No | yes | yes | yes | yes | ||||
| NITROGEN FILLED | Yes / No | yes | yes | yes | yes | ||||
| FOLDING EYECUPS | Yes / No | Twist-up eyecup | Twist-up eyecup | Twist-up eyecup | Twist-up eyecup | ||||
| UNIT DIMENSION | mm | 335x150x80 | 335x150x80 | 438x150x95 | 438x150x95 | ||||
| UNIT WEIGHT | gm / oz. | 770g | 770g | 1150g | 1150g | ||||