50mm F1.2, 40mm F1.2 and 35mm F1.2 for 35mm full-frame mirrorless cameras from SIGMA [Patent]
SIGMA filed a patent of f/1.2 lenses with various focal lengths, 50, 40 and 35 mm, for mirrorless cameras with 35mm full-frame sensor.
【公開番号】特開2019-197125(P2019-197125A) click here
【公開日】令和1年11月14日(2019.11.14)
【発明の名称】結像光学系
50 mm, f/1.2 Specification and lens arrangement of embodiment 1
Focal length: 50.99 mm
F no: 1.25
2ω : 45.97
Image height: 21.63 mm
Lens length: 154.20 mm
40 mm, f/1.2 Specification and lens arrangement of embodiment 4
Focal length: 41.35 mm
F no: 1.26
2ω : 57.17
Image height: 21.63 mm
Lens length: 157.00 mm
35 mm, f/1.2 Specification and lens arrangement of embodiment 6
Focal length: 35.99 mm
F no: 1.26
2ω : 64.62
Image height: 21.63 mm
Lens length: 140.00 mm
【公開番号】特開2019-197125(P2019-197125A) click here
【公開日】令和1年11月14日(2019.11.14)
【発明の名称】結像光学系
50 mm, f/1.2 Specification and lens arrangement of embodiment 1
Focal length: 50.99 mm
F no: 1.25
2ω : 45.97
Image height: 21.63 mm
Lens length: 154.20 mm
40 mm, f/1.2 Specification and lens arrangement of embodiment 4
Focal length: 41.35 mm
F no: 1.26
2ω : 57.17
Image height: 21.63 mm
Lens length: 157.00 mm
35 mm, f/1.2 Specification and lens arrangement of embodiment 6
Focal length: 35.99 mm
F no: 1.26
2ω : 64.62
Image height: 21.63 mm
Lens length: 140.00 mm
Hi there,
Congratulations, you have found the patent request corresponding to the Sigma 35mm f/1.2 DG DN | Art (example 6 or 7).
The three examples of a 50mm f/1.2 and the two of a 40mm f/1.2 are a mere decoys。
by Mistral75 (2019-11-19 07:07)
Dear Mistarl75、
Thanks for your comment.
I think that 50mm and 40mm would be competitors against 35mm during a productization.
by hi-low (2019-11-20 10:12)