The lens design comprises seven lens elements in five groups. A double aspherical lens element minimizes monochromatic aberrations and three glasses with anomalous partial dispersion ensure an extremely well-balanced chromatic correction. As a floating element, the rearmost element ensures exceptional contrast of detail at all distance settings. The constant length when focusing offers extra protection against dust and splashes and in addition the harder glasses used contributes to the robust character of the front and rear lens elements. The very elaborate construction is designed for maximum contrast performance even at full aperture, and at the nearest focusing distance keeps the lens free from artifacts. Chromatic aberrations are corrected to an absolute maximum. The stable lens body and the perfect seal against dust and splash water guarantee durability and reliability.
Please contact us if you require additional details.