WebJun 12, 2024 · Photodo MTF results (not the be-all-and-end-all) were appalling at the tele end (even worse than things like Tamron superzoom 28-300); Photodo test result: 2,5 Effective focal length: 82 - 308 Weighted MTF for 80 mm: f4,5 0,74, f8 0,80 Weighted MTF for 135 mm: f4,8 0,69, f8 0,78 Weighted MTF for 200 mm: f5,2 0,63, f8 0,68 WebAug 11, 2008 · Photodo test result: 4 Effective focal length: 35 Weighted MTF for 35 mm: f2 0,69, f2,8 0,72, f4 0,79, f8 0,83 Average Weighted MTF: 0,81 Grade: 4,0 Weighted MTF 10 lp/mm: 0,90 Weighted MTF 20 lp/mm: 0,77 Weighted MTF 40 lp/mm: 0,53 Distortion: % - %

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Take a look at the 50/1.8 AF Nikkor ($100, 4.4) and the 50/2 . WebMay 17, 2015 · The first number is the weighted MTF score, which is on a logarithmic scale that tops out at 5.0. In my experience, a relatively low score on the old photodo weighted MTF metric is not necessarily a bad thing (the legendary Contax CZ 35-70/3.4 scored 3.8), but a high score on this scale is a reliable indicator of an excellent lens. northbrook demographics

Understanding Photodo

http://www.zen20934.zen.co.uk/photography/MTF_Files/Photodo_Canon_CV.htm The weighted averages, on the other hand, are best taken with a grain of salt. Each line on an MTF graph is made from several measurements (at various distances from the center); photodo puts three pairs of lines on each graph (sagittal and meriodional lines at each of three spatial frequencies); they test each lens at two or more apertures ... WebFor more than 35 years, MTF Biologics has been processing tissue grafts from human donors that are used in a growing array of clinical applications – positively affecting lives across the globe. Tissue and organ … northbrook days entertainment