近日Canon News发现了佳能多项恒定光圈变焦镜头专利,它们大部分用于RF卡口,有一个似乎用于EF-S。
佳能RF 28-135mm f / 4:
焦距:28.84mm 80.09mm 135.75mm
F值:4.12 4.12 4.12
半视角:33.13°15.12°9.06°
图像高度:18.82mm 21.64mm 21.64mm
镜头总长:167.97mm 167.97mm 167.97mm
BF:27.78mm 27.78mm 27.78mm
佳能RF 24-170mm f / 4:
焦距:24.72mm 99.78mm 166.47mm
F值:4.12 4.12 4.12
半视角:37.29°12.23°7.40°
图像高度:18.82mm 21.64mm 21.64mm
镜头总长:236.70mm 236.70mm 236.70mm
BF:23.98mm 23.98mm 23.98mm
佳能RF 28-280mm f / 2.8:
焦距:27.81mm 146.83mm 269.60mm
F值:2.88 2.88 2.88
半视角:34.09°8.38°4.59°
图像高度:18.82mm 21.64mm 21.64mm
镜头总长:340.47mm 340.47mm 340.47mm
BF:32.97mm 32.97mm 32.97mm
佳能EF-S 17-170mm f / 3.5:
焦距:17.51mm 83.09mm 169.77mm
F值:3.61 3.60 3.61
半视角:36.33°10.10°4.98°
图像高度:12.88mm 14.80mm 14.80mm
镜头总长:248.91mm 248.91mm 248.91 mm
BF:40.40mm 40.40mm 40.40mm
文章来源:Patent: RF mount constant aperture superzoom lenses, including an RF 28-280mm f/2.8
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