Ikeda Lens Kenmax 29g Monocular 4x Perspective KM421 Multi-use

●Width (mm): 22●Height (mm): 51●Effective field of view (mm):*●Magnification (x) Infinity: 4.2●Magnification (x) Close range: 5.3●Visible range 100m ahead (m) :17 ● Maximum close distance position (cm): 20 ● Objective lens (mm): Effective diameter 10 ● Actual field of view (degrees): 12.5 ● Eye relief (mm): 14 ● Mass (g): 29 ●Brightness: 5.7 ●Pupil diameter: 2.4mm ●Lens: Optical glass lens (fully multi-coated) [Features] ●It is a telescope that can observe from the maximum close focus position to infinity. ●Comes with a monocular case. ●Equipped with a finger ring that will not cause fatigue even when used for long periods of time, which will be appreciated by people with amblyopia. ●Optical lenses and metal parts are made in Japan. [Application] ●General inspection and observation. 【use】 ●Effective field of view (mm):＊ ●Width (mm): 22 ●Height (mm): 51 ●Eye relief (mm): 14 ●Magnification (times) infinity: 4.2 ●Magnification (times) close range: 5.3 ●Visible range 100m ahead (m): 17 ●Maximum close distance position (cm): 20 ●Objective lens (mm): Effective diameter 10 - Actual field of view (degrees): 12.5 ●Mass (g): 29 ●Brightness: 5.7 ●Pupil diameter: 2.4mm [Material/Finish] ●Lens: Optical glass lens (fully multi-coated) [Set contents/accessories] 【Note】