The Biplanat appeared around 1902. The series I, introduced at that time, was an f5.8 rapid rectilinear for general use. The series II, introduced c. 1904, at f6 was for portraiture giving a soft image at full aperture. A series IV is listed as focusing. The series I lasted only a few years. The series II continued until the late 1900s in focal lengths from 5 ½ - 17".

The Port-Land was sold in Britain by Sinclair in sizes of 6 - 18" and later to 20". It comprises a simple achromat meniscus lens mounted behind an iris diaphragm. The amount of softness can be controlled by altering the iris.