Vixen is a Japanese company that makes telescopes, binoculars, spotting scopes and accessories for their products.

It provides correction of aberrations via a two-element meniscus-shaped corrector lens in front of the secondary mirror.

In fact, given that it has no astigmatism and field curvature, it performs better than a true RC.

There is the downside of the potential for chromatic aberration due to the refractive elements, but it is hardly noticeable.

These features together make for a telescope that is very well suited to astrophotography either at the native f/9 or using the optional focal reducer at around f/6.3.