A first for any KOWA eyepiece, the optical construction of the TE-11WZ II contains 2XD-lenses.Images are delivered with outstanding sharpness even at 60X / 70X magnification. Chromatic aberration is limited at the highest level. Eye relief of 17mm remains constant throughout the magnification range. The TE-11WZ II delivers a 20% wider field of view than the previous model (TE-10Z)