10月3日,佳能在美国公布编号20190302404专利,该专利涉及RF 70-240mm F4 IS USM、RF 70-300mm F4-5.6 IS USM两款镜头。在未来1-2个月内,佳能有望发布RF 70-200mm F2.8 L IS USM镜头,从而完成搭建RF大三元镜头组合。而从曝光的专利来看,佳能目前也正在着力售价更为亲民的远摄变焦镜头的研发工作。
佳能RF 70-240mm F4 IS USM镜头专利详情:
- 焦距:72.10mm 131.78mm 242.00mm
- 光圈:4.10 4.10 4.10
- 半画角:16.70° 9.32° 5.11°
- 像高:21.64mm 21.64mm 21.64mm
- 镜头全长:147.22mm 176.39mm 210.90mm
- 后焦距:12.95mm 25.54mm 36.63mm
佳能RF 70-300mm F4-5.6 IS USM镜头专利详情:
- 焦距:72.10mm 144.31mm 289.00mm
- 光圈:4.60 5.68 5.88
- 半画角:16.70° 8.53° 4.28°
- 像高:21.64mm 21.64mm 21.64mm
- 镜头全长:136.41mm 169.48mm 201.14mm
- 后焦距:12.95mm 28.75mm 42.22mm
via:canonnews