binocular viewer meaning in English

双目观测镜
双筒观测镜

Removing the extension tube shortens the spacing to allow any binocular viewer to reach focus without a barlow lens
除去延长管缩短间隔让任何的用两眼的观众到达没有一个巴罗镜的焦点。
This feature , unique among premium quality refractors , allows the widest low - power fields possible with a binocular viewer , for truly panoramic and almost three - dimensional deep space images
这一个特征,独特的在高级的质量折射体之中，允许最宽的低通光量可能的与一个用两目的使用者,为真正全景三维空间的宇宙深部景象。