The Vivitar Series 1 Macro 90 mm f/ 2.5 is a legendary macro lens, designed and manufactured to the order of Vivitar by Tokina, a Japanese manufacturer of optic systems. The lens can take 1:2 macro scale pictures - 1:1 macro scal with extender.
The 90mm f/2.5 is very sharp, producing a nice natural color and exceptional contrast in photos. The lens is also versatile with optics suitable for shooting in many photographic applications, including portraiture. Its 8-bladed diaphragm creates a beautiful bokeh. Its optical design consist of eight elements in seven groups and 15.47-inches close focusing distance anf 58mm filter thread.