Steinheil continued his lens design, and in 1881, developed an Antiplanet lens, which not only corrected the colour, but made negative lenses that generated opposite aberrations that the positive lens generates. The landscape lens is an example of how the lens design form plays a big part in the performance and the development of the lens design. Get Your FREE Ultimate Guide to Lens Design using the Spreadsheet Method With this guide, you can: -Save valuable time in your lens design process -Get the Spreadsheets that show the inner workings of lens design ?-Get the fundamentals of lens design in an accessible format SUBSCRIBE This FREE ebook (and newsletter) will help you uncover the tactics of lens design.