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14 mm F1.2 and 35 mm F1.2 in addtion to 25 mm F1.2 for m4/3 from SIGMA [Pantent]

Sigma filed patent of 14 mm F1.2 and 35 mm F1.2 in addition to 25mm F1.2 for m4/3.

【公開番号】特開2017-191130(P2017-191130A) click here
【公開日】平成29年10月19日(2017.10.19)
【発明の名称】大口径比レンズ

Specification and lens arrangement of embodiment 6
Focal length: 13.92 mm
F No.: 1.28
2ω: 81.14
Image height: 10.82 mm
Lens length; 105.02 mm
JPA_429191130_000029.gif

Specification and lens arrangement of embodiment 7
Focal length: 34.98 mm
F No.: 1.28
2ω: 33.12
Image height: 10.82 mm
Lens length; 110.14 mm
JPA_429191130_000034.gif
nice!(2)  コメント(2) 
共通テーマ:趣味・カルチャー

nice! 2

コメント 2

Mistral75

Hi there

This looks very much like the patent of the optical formula of Olympus M.Zuiko Digital ED 25mm f/1.2 Pro.

Example 1 in the patent application is very close to the optical formula of the Olympus lens. The only difference is that the single L1bp4 biconvex element of the example is replaced by two biconvex elements in the actual lens。
by Mistral75 (2017-10-19 23:37) 

hi-low

Thanks your comment, Mistral75,

I fully agree with you.
As Olympus did, Panasonic released 12mm F1.4 (may be made by SIGMA) as "LEICA DG SUMMILUX"。
http://hi-lows-note.blog.so-net.ne.jp/2017-09-21

by hi-low (2017-10-20 13:46) 

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