SRATE Bird Watching BAK4 Porro 25-75x70 high clarity spotting scope with tripod monocular telescope
Magnification | 15X-45X | 20X-60X | 25X-75X | 20X-60X | 25X-75X |
Objective diameter(mm) | 50 | 60 | 70 | 80 | 100 |
Front lens diameter (mm) | 73 | 82 | 92 | 102 | 122 |
Prism | BAK4 | BAK4 | BAK4 | BAK4 | BAK4 |
Prism Type | Porro | Porro | Porro | Porro | Porro |
Eyepiece diameter(mm) | 15 | 15 | 15 | 21 | 21 |
Lens CoatingS | FMC | FMC | FMC | FMC | FMC |
Field of view(°) | 2.4-1.14 | 2.1-1 | 1.9-0.91 | 2.2-1.1 | 2.1-1.0 |
Eye relief(mm) | 16-14 | 16-14 | 16-14 | 21-15 | 21-15 |
Close distance(m) | 5 | 5 | 5 | 8 | 5 |
Tripod | YES | YES | YES | YES | YES |
Waterproof (Y/N) | YES | YES | YES | NO | YES |
Fogproof(Y/N) | YES | YES | YES | NO | YES |
Diopter adjustment | -4D~+4D | -4D~+4D | -4D~+4D | -4D~+4D | -4D~+4D |