Objective diameter: 70 mm
Focal length: 400 mm
IPD: 57 – (>)80 mm
Focal ratio: f/5.7
Weight (w/o eyepieces, with eyepiece cover and objective caps): ca. 4000 g
Made in: Japan
Vixen has been making binocular telescopes (BTs) in three sizes: with 70mm objective lenses, 81mm and 126mm. All of these have been on the market for some time now, and in the beginning, they did not face much competition in their price segment. Since a few years, competitors such as APM or Oberwerk, who have been successfully marketing China-made binocular telescopes in various sizes, have been outperforming Vixen’s BTs, but these are still being sold and find buyers who love the nice finish, easy handling and good optics of these Japanese instruments. The 70mm model features ED glass (the larger 81mm and 126mm models are just plain achromats) and produces nice color-free images of bright objects such as the moon or major planets. As the image of the Vixen 70 is not as bright as the one in the same size APM (see separate post “APM 70mm ED APO”, https://binocular.ch/apm-70mm-ed-apo/), BINOCULARS TODAY prefers using magnifications below and up to 44x (9mm eyepieces). One big advantage of all Vixen models: the screws for the adjustment of the prisms are easily accessible and allow simple alignment of the images in the two tubes.
see also remarks under the separate post “Vixen BT81S-A”, https://binocular.ch/vixen-bt-81s-a/