哈苏实验室对各家镜头的MTF测试结果（The results of the MTF test for each lens in the hau lab）.doc

哈苏实验室对各家镜头的MTF测试结果（The results of the MTF test for each lens in the hau lab） The results of the MTF test for each lens in the hau lab Hasselblad laboratory after determination of the MTF values of each lens curve, made the calculation method of MTF emphasize particularly on average, first of all, due to the focal length, respectively for the lens MTF values of f4 and f8, focusing on the multiplied by the coefficient of 0.4 and 0.6, respectively, together to get MTF values under a certain line frequency, and then to take 10 line/mm multiplied by the coefficient of 0.57, on average 20 lines of/mm multiplied by the coefficient of 0.29, on average, 40 line of/mm multiplied by the coefficient of 0.14, on average three Numbers together, you get the MTF of the lens focus on average. Score the shots according to these values. The scores range from 0 to 5, making the points of various lenses explicit, unlike some test results, which give a good impression, but lose the guiding significance. 1. Top lens Canon EF 200mm f1.8l Of the hundreds of 35mm camera lenses produced around the world, only 19 of the hundreds of cameras that can be included in the top end of the camera (with a score of 4.5 or more, MTF focuses on average above 0.86). All these lenses are fixed. The standard lens has eight (two with macro), 75 ~ 75 mm focal length head with 4, 90 ~ 90 mm focal length head has six (three with macro), the highest score for Canon 200 mm / 1.8 lens (4.8 points, the MTF emphasize particularly on average 4.8). Leica takes up six of the companys divisions M series: 50/2,75/1.4, 90/2.8; R series: 50/2 (second-hand 4.5 K), 90/2.8 (used 3K), 100/2.8 Macro (used 11K) 4 (50/1.7, 50/1.4, 85/1.4, 45/2g) Canon three (ef85/1.2 (new 13K), ef13/2 (new 5.7 K), EF 200/1.8 (used 30K)) Pentax 3 (50/1.4, 50/2.8 Macro, 85/1.4) Two (AF 50/2.8 Macro, AF 100/2.8 Macro) Tuli (MF AT - X 90/2.5 Macro) The powerful nikon didnt have a single shot. The hassu laboratory is the worlds leading authority on the