... is smaller than f / 5.6 (larger f /stop number than f / 5.6 ). EF14 mm F 2.8 L USM EF24 mm F 1.4 L USM EF100 mm F 2.8 ... EF400 mm F 2.8 L USM * EF500 mm F 4.5 L USM EF600 mm F 4 L USM EF1200 mm F 5.6 L USM ... 16-35 mm F 2.8 L USM
... 0.01 mm f = 17 mm T 5.6 ... 9.49 3.5 f = 25 mm T 5.6 ... 5.50 3.5 f = 35 mm T 5.6 ... 4.63 3.5 f = 50 mm T 5.6 300 .64 ... 4.29 3.5 f = 90 mm T 5.6 ... 4.09 3.5 f = 120 mm T 5.6 ... 4.05 3.5 ... 0.01 mm f = 17 mm
Telephoto Lens DEFINITION: Lenses between 80 mm and 300mm are considered telephoto lens. An 80mm lens is considered a shot telephoto and a 300mm lens is considered a long telephoto lens.
Canon currently offers four cine zoom lenses that between them span some 14.5 mm to 300mm . The behavior of their respective Maximum Relative Apertures over their focal lengths is shown in Figure 1.
Figure 4 Showing computer simulation results for the wide-angle cine zoom lens (at 40LP/mm) In the case of the more challenging lens – the new 10x telephoto CN-E30– 300mm T2.95 – the computer simulation finally produced an optimized performance shown in Figure 5 – a truly exemplary promise. Figure 5 Showing computer simulation results for the 10:1 telephoto cine zoom lens (at 40 LP/mm)
