회원정보

www.canonrumors.com/patent-...

Patent: Soft Focus Lens Designs, Various Focal Lengths

Canon has filed a patent spotted by Canon News for a variety of soft focus lenses. The most interesting of the bunch is a 70-200 f/4 full frame lens with a backfocus of 25mm, meaning it’s not an EF mount lens.

35mm f/1.8 full frame EF Canon mount

Focal Length 33.75
F-Number 1.72
Image Height 21.64
Total Lens Length 132.93
BF 39.14

58mm f/1.4 full frame EF Canon mount

Focal Length 57.57
F-Number 1.43
Image Height 21.64
Total Lens Length 160.04
BF 40.43

105mm f/2.0 full frame EF Canon mount

Focal 103.2
F-Number 2.17
Image Height 21.64
Total Lens Length 123.79
BF 42.2

70-200 f/4 full frame BF of 25mm (not EF mount)

Focal 72.21 – 194.06
F-Number 4.00
Image Height: 21.64
BF 25.98

요약

4 개의캐논렌즈특허가발견되었다. 그런데 흥미로운것이있다면 backfocus of 25mm의 70-200 f/4 full frame BF of 25mm (not EF mount)특허가있다는것이다. 이것은 EF마운트가아니라는것으로 캐논풀프미러리스용 70-200 f/4렌즈의특허일까?