Chinon's telephoto — the Auto 135mm f/2.8 with decent speed for the mount.
The Chinon Auto 135mm f/2.8 is a fast telephoto prime from the now-defunct Chinon brand. At f/2.8, it provides more speed than typical f/3.5 alternatives at 135mm. The Auto designation indicates auto diaphragm. Mount not specified — Chinon produced for various systems. Chinon quality is functional. The f/2.8 is the distinguishing feature.
Functional Chinon quality. The f/2.8 at 135mm provides more speed than typical budget alternatives. Sharpness acceptable. Auto diaphragm. Chinon optics are basic but the f/2.8 speed adds genuine practical value for portrait DOF and low-light work. Build quality varies. Chinon is defunct — no support. Verify mount before purchase.
Mount not specified — verify. Weight varies. Build quality varies. Chinon defunct — no support. The f/2.8 is the main advantage over f/3.5 alternatives. Manual focus with auto diaphragm. The mount must be confirmed. Better known-brand 135mm f/2.8 options may exist at similar near-zero pricing.
Very cheap. The f/2.8 adds speed. Verify mount. Chinon defunct. Better alternatives may exist at similar cost from known brands. The f/2.8 speed is the sole advantage. Only if mount-compatible and better alternatives unavailable. Functional but from a defunct manufacturer.