Kiron — Kino Precision 70-210mm f/4-5.6 manual telephoto zoom across major vintage SLR mounts
Kiron was the consumer brand of Kino Precision Industries, which built the original Vivitar Series 1 lenses under contract before launching its own-name range in 1980. The 70-210mm f/4-5.6 telephoto zoom was part of that lineup, sold through the mid-1980s before autofocus SLRs reshaped the market.
Kiron offered the 70-210mm f/4-5.6 across the major manual-focus SLR mounts of the era, including Canon FD, Nikon F (AI/AI-S), Pentax K/KA, Minolta SR, Olympus OM, Konica AR and Contax/Yashica, and ran a paid mount-conversion service. It is manual focus and aperture, built to the mechanical standard Kino Precision was known for. Element count, weight and filter thread are not confirmed from available sources.
Kino Precision built a reputation for matching or exceeding first-party optical and mechanical quality among independents, and this zoom reflects that with solid focus and zoom action, less loose than typical budget third-party zooms.
Kiron lenses are sought after for that reputation, so prices hold up better than most contemporaries. Check for smooth zoom and focus travel, a clean aperture ring, and that the mount generation matches the intended body.