On the left: Steinheil Serie III Improved Aplanatic Lens 360 mm. (14 1/3 inches) cover from 8×10 to 10×12.
Right: Serie V Extreme Wide-Angle Aplanat 180 mm. (7 1/4 inches) cover 10 1/4 x 10 1/4 inches (26×26 cm.)
A series of lenses manufactured by Steinheil that are extremely valid even today. It is worth rediscovering it