Vivitar  made a number of high quality zooms under the Series I label. The 90mm to 180mm f4.5 flat-field VMC lens from 1978 is an one of them.

This Vivitar 90-180mm f/4.5 lens was really designed for medical photography needs. A ring-light flash unit was designed to mount on the front of this lens too. This original medical market niche explains some of the design features and range of this high quality zoom lens.

This lens is long, and pretty heavy. It produces excellent results in macro-work down to 1:4 at 90mm and to 1:2 at its 180mm setting.

On most modern zoom lenses, macro photography settings are a lower quality setup. Achieving macro capabilities means shifting some elements and so sacrificing some of the zoom's control over spherical and other aberrations.

One of the most wanted Carl Zeiss lens generally.This is very good lens for macro photography too. It is render very sharp images like Sonnar 135 mm or Konica Hexanon normal and short-telephoto lens.

Carl Zeiss Jena lenses issue date by serial number 

3,000,000-3,200,000: 1945-1949
3,200,000-3,470,000: 1949-1952
3,470,000-4,000,000: 1952-1955
4,000,000-5,000,000: 1955-1958
5,000,000-6,000,000: 1958-1961
6,000,000-6,000,000: 1961-1964
7,000,000-8,000,000: 1964-1967
8,000,000-9,000,000: 1967-1970
9,000,000-10,000,000: 1970-1975