With an aperture of f/2.8, this is a compact large-aperture telephoto lens that marks the successful improvement of performance and reduction of weight while being the brightest in this class of telephoto lenses.
It was developed based on strong demands from professional photographers working in the press, and new steps taken in the optical system and barrel give excellent operability on par with a small-aperture lens.
The various types of aberration that occurred in small and lightweight telephoto lenses have been completely compensated for through the development of new optical systems and appropriate selection of glass materials, resulting in excellent operability in addition to high performance and high resolution.