Vixen A80Mf

Worth knowing before you buy

How does the Vixen A80Mf compare optically to ED doublets at the same price point?

The A80Mf has good optics for an achromat but shows noticeable chromatic aberration compared to ED scopes, particularly on bright objects like planets. Members note it takes magnification well and performs admirably on double stars, but most who own both prefer their ED scopes for overall contrast and color correction.

What mount do I need for the A80Mf?

Members report the A80Mf works well on modest equatorial mounts like the Vixen GP, EQ-5, or Takahashi EM-11 due to its lightweight design (around 8-9 lbs for the OTA). An EQ-6 or EM-200 provides rock-solid stability if you plan to use a binoviewer or heavier accessories.

Is the A80Mf's focuser adequate?

The A80Mf has a functional rack-and-pinion focuser that works acceptably for visual observing, but members with other Vixen models describe it as having a slightly 'agricultural feel' compared to more expensive offerings. It holds eyepieces adequately and doesn't slip noticeably, though some users note the mechanics feel less refined than ED scope focusers in the same price range.

Should I buy an achromat like the A80Mf over a modern ED doublet?

Most forum members who have compared them recommend ED doublets, particularly the TS-102ED f/11, as they offer significantly better color correction in shorter tubes while costing similar amounts. The A80Mf appeals primarily to users who specifically want the 'long refractor' experience, can tolerate some CA, or are collecting vintage-style instruments.

What are the A80Mf's strengths and limitations?

The A80Mf excels on double stars and lunar/planetary detail despite some CA, is mechanically robust, and remains portable enough for grab-and-go observing with modest mounts. Its main limitation is aperture—80mm restricts performance on deep-sky objects—and the persistent chromatic aberration bothers users accustomed to ED scopes.

Is the A80Mf worth the premium over cheaper Chinese achromats?

Forum members who own the A80Mf consider the Japan-made mechanics and consistent optics worth the extra cost over budget alternatives, especially if purchasing from optical retailers with quality control. However, several note that at more than twice the price of a budget 80mm, the practical performance gain may not justify the expense unless you specifically value build quality and the 'Vixen feel.