Imaging errors are a decisive factor for the performance characteristics of a lens. Therefore, the image error correction is one of the most important tasks in the development and realization of a high-performance lens. In the case of chromatic aberration, a distinction is made between lateral chromatic aberration and longitudinal chromatic aberration. Transverse chromatic aberration can be corrected later using image processing software, whereas longitudinal chromatic aberration cannot be corrected later.

Corrects color aberrations to ensure unsurpassed expressive performance

This lens incorporates FLD ( "F" Low Dispersion) glass elements , which have the same performance as fluoride glass, and SLD (Special Low Dispersion) glass elements. By optimizing the power alignment of the lens, both types of aberrations could be corrected. As a result, the lens achieves enormously high imaging performance over the entire distance range. Astigmatism and image field curvature have also been corrected by the matching alignment of aspherical lenses. This results in extremely high resolution, even in the peripheral areas.

Coma (asymmetry error) correction provides less blur for point light sources at the periphery, making the lens ideal for astrophotography and illuminations.

Round aperture

The near-round a perture provides a very pleasing bokeh outside of the image's plane of focus. The aspherical lens element, used as the first lens, provides the optimal edge illumination while correcting distortion.

Floating internal focusing system

The floating focus system enables correction of both astigmatism and spherical aberration and provides extremely high optical performance for close-up photography. 

Reflection and ghosting eliminating design

We achieved the high image quality of this flagship lens by thoroughly evaluating reflections and ghosting at an early stage of design to create an optical design that is unaffected by adverse incident light. Super Multi-Layer Coating (SML) reduces flare and ghosting and delivers sharp, high-contrast images, even when backlit.

Fast focusing

The Hyper Sonic Motor (HSM) provides fast and silent focusing, which can be manually intervened at any time. Thanks to the improved AF algorithm, AF is now smoother.

Brass bayonet

The lens is equipped with a solid and precise brass bayonet. The special treatment of the surface to reinforce strength allows long-term use.

Design concept

The new product lines include a rubber coating at the base of the supplied lens hood. The lens caps and AF/MF switches have also been redesigned for improved usability. The internal parts, metal parts, and the new material called "TSC" (Thermally Stable Composite), which combines well with metals, are arranged so that the products can demonstrate optimal accuracy.

Additional advantages