Yashica's telephoto for AF system — the 70-210mm f/4.5 for Yashica AF cameras.
The Yashica AF 70-210mm f/4.5 is a telephoto zoom for the extremely limited Yashica AF mount. Standard telephoto range at f/4.5. AF within the system. The Yashica AF mount is one of the most restricted camera mount systems with minimal camera compatibility. A functional telephoto with no practical modern utility.
Functional Yashica optics. The 70-210mm covers standard telephoto. Constant f/4.5. AF capability within the system. Build quality functional. The Yashica AF mount restricts all use to the tiny Yashica AF camera ecosystem. No adaptation options exist. A functional lens with no practical market.
Yashica AF mount. AF capable. Constant f/4.5 — a modest advantage. Weight varies. Build quality functional. The mount limits everything. No adapters. The constant aperture is the only modest distinguishing feature — wasted on the extremely limited mount system.
Essentially valueless. Yashica AF mount. Not recommended for any purpose. Only for the extremely rare Yashica AF camera owner. No modern utility or adaptation options available for this mount system.