Tamron's Adaptall-2 tele-zoom — the 80-210mm f/3.8-4 CF Tele Macro (103A), interchangeable-mount, 1:2.8 close focus.
The Tamron 80-210mm f/3.8-4 CF Tele Macro, model 103A, was introduced in 1981 as an all-new optical design replacing the earlier model 03A, and became one of Tamron's best-selling lenses of the early to mid 1980s. It used the Adaptall-2 interchangeable mount system, so one lens could be fitted to almost any SLR system via the appropriate mount adapter. It was replaced in 1986 by the 70-210mm f/3.8-4 model 46A as the market moved to autofocus.
The 103A is a manual-focus telephoto zoom of 13 elements in 10 groups, covering 80-210mm at f/3.8-4 and stopping down to f/32 with automatic-exposure coupling through the Adaptall-2 mount. Minimum focus is 0.9 m from the film plane, with a CF tele-macro mode reaching 1:2.8 magnification. It takes 58mm filters, measures about 137.7mm long by 64.5mm in diameter, and weighs 634 g in an all-metal barrel with BBAR multi-coating.
Optically it was above average for its class: slightly soft corners wide open at the 80mm and 210mm settings, improving to very good sharpness across the frame from f/5.6 at all focal lengths. The 80-210mm range with close-focus macro capability made it a versatile one-lens telephoto for portraits, travel, nature and general use, and the all-metal construction gives the controls a solid, well-damped feel.
Examples are plentiful and cheap on the used market, but a lens is only usable with an Adaptall-2 mount adapter, so confirm one is included for your system or budget for it separately. Check for haze and fungus between the many elements, oil on the aperture blades, and smooth operation of the zoom and macro collar. With the right Adaptall-2 adapter, or a two-stage adapter, it mounts easily on mirrorless bodies.