200mm · f/5.8
The Tamron 200 mm f/5.9 T mount model FO-59 is a budget lens with a simple optical design: a doublet plus a flat protective element, contrary to Tamron's stated 3 elements in 2 groups. Optical quality is limited, likely due to its low-end construction. Build and handling reflect its cost-cutting approach. It may suit users seeking an inexpensive telephoto lens for casual use, but serious photographers should consider alternatives.