Overview

The Ultra-Achromatic-Takumar 85mm f/4.5 is a rare lens with quartz and calcium fluoride elements, enabling imaging from deep UV through visible to IR. It is described as 'diminutive' but 'packs a real punch' for UV work. A blog test notes it is used to determine chromatic aberration on black-white transitions, suggesting good correction. No weaknesses are mentioned; build is compact. It suits photographers needing broad-spectrum performance, especially UV imaging enthusiasts.