still manufactured today. Optical designs are 6 elements in 4 groups, and they are optimized for >10× enlargements. 16 mm f/2.8 25 mm f/4 28 mm f/4 (for 18×24 mm) 35 mm f/4 (for 126 film) 40 mm f/4 (for 24x24 mm) 50 mm f/4 (for 24x36 mm) 60 mm f/5.6 (for 4×4 cm) 80 mm f/5.6 (for 6×6 cm) 100 mm f/5.6 (for 6×7 cm) 105 mm f/5.6 (for 6×9 cm) 135 mm f/5.6 (for 4×5 in) 150 mm f/5.6 (for 4×5 in) 180 mm f/5.6 (for 5×7 in) 210 mm f/5.6 (for 5×7 in) 240 mm f/5.6 (for 8×10 in) 300 mm f/5.6 (for 24×30 cm) 360 mm f/5.6 (for 30×40 cm) Componon-S These are high quality enlarger lenses which are updated versions of the Componon line. Most are 6-element, 4-group lenses except for the 50mm F2.8 which was originally released as a 5-element, 4-group design but which changed (from serial number ...?) to a 6-element, 4-group design. They are corrected for flatness of field, contrast, and color rendition. 50 mm f/2.8 (for 35 mm) 80 mm f/4 (for 6×6 cm) 80 mm f/5.6 100 mm f/5.6 (for 6×9 cm) 105 mm f/5.6 135 mm f/5.6 (for 4×5 in) 150 mm f/5.6 (for 4×5 in) 180 mm f/5.6 (for 5×7 in) 210 mm f/5.6 (for 5×7 in) 240 mm f/5.6 (for 8×10 in) 300 mm f/5.6 (for 24×30 cm) 360 mm f/6.8 (for 10x12 in) WA-Componon A 6-element, 4-group line of wide-angle enlarging lenses. 40mm f/4 (for 24x36mm) 60mm f/5.6 (for 6×6 cm) 80mm f/5.6 (for 6×9 cm) G-Componon A 6-element, 4-group line of lenses optimized for enlargements above 20×. 100 mm f/5.6 (for 6×9 cm) 150 mm f/5.6 (for 4×5 in) 210 mm f/5.6 (for 5×7 in) 240 mm f/5.6 300 mm f/5.6 (for 8×10 in) 360 mm f/6.8 480 mm f/9.4 (for 24×30 cm) APO-Componon HM These are 6-element, 4-group apochromatic enlarger lenses, using high-modulation glass elements, designed for critical color rendition and precision industrial applications. 40 mm f/2.8 45 mm f/4 60 mm f/4 90 mm f/4.5 120 mm f/5.6 150 mm f/4 Betavaron The Betavaron is a zoom enlarging lens for 35 mm film. The relative positions of the negative, paper easel, and lens remain fixed, while the magnification setting of the lens is changed to alter the degree of enlargement. The design is 11 elements. The Betavaron 3...10, the base model, is limited