Overview

The Promaster Spectrum 7 28 mm f/2.8 MC is a cheap, all-metal manual lens from the 1980s, likely made by Cosina or Haking. Its optical performance is poor, with very low sharpness, contrast, and color rendition, plus heavy chromatic aberration and wild bokeh. Build quality is solid and tactile, with smooth focus and aperture rings. It suits budget buyers seeking a quirky, effects-driven wide-angle lens or a paperweight, but not those wanting sharp images.