Contax 500mm f/8 Mirotar T* C/Y Mount Lens Review

The Contax 500mm f/8 Mirotar T* is a classic mirror lens from the Contax/Yashica mount era, built around a catadioptric design that keeps size and weight down compared to traditional telephoto optics. The f/8 aperture is fixed, a hallmark of mirror lenses, which means no aperture control and characteristic donut-shaped bokeh in out-of-focus areas. The T* multicoating aims to improve contrast and reduce flare, though mirror lenses by design tend to be softer at the edges and more susceptible to chromatic aberration than their refractive counterparts.

At 500mm, this lens delivers serious reach for wildlife, sports, or distant subjects, and its compact form makes it more portable than a conventional 500mm prime. However, the fixed f/8 aperture limits low-light performance and demands higher ISO or bright conditions. Manual focus is required, and focus can be finicky given the shallow depth of field at this focal length. The C/Y mount is adaptable to many modern mirrorless bodies, but autofocus and electronic communication are off the table. This is a niche tool for shooters comfortable with manual operation and the quirks of mirror optics.