This 5-lens eyepiece design combines the viewing comfort and large corrected field of Erfle-design eyepieces with the advantages of the popular Plossl design.
The fifth lens element offers a better sharpness and colour correction throughout the visible field and also results in a flatter focal plane.
Probably the most important feature is the optimized eye relief both in long and short focal length eyepieces of this type. The eyepieces have a scratch-resistant broadband multicoating. The robust coating meets US Military standards.
The 5 lens Eudiascopic eyepieces from a new eyepiece design in its own right - more than just a slightly modified Plossl design!
