Sigma corresponds to the full-size SLR 11-22mm F4.5-5.6 of a patent is pending.
Description, self-interpretation of the patent literature
- Patent Publication No. 2015-203734
- Published 2015.11.16
- Filing date 2014.4.11
- Example 1
- Zoom ratio 1.88
- Wide-angle intermediate telephoto
- Focal length 11.33 15.33 21.30
- F-number 4.50 5.00 5.86
- Total angle of view 2ω 126.85 108.80 87.93
- Image height Y 21.63 21.63 21.63
- Overall length of the lens 163.42 156.24 156.59
From left to right, the spherical aberration, astigmatism, distortion. Above infinity, under the time of 400mm focus.
Ultra-wide-angle zoom lens of Art line
Sigma patent applications corresponding to the full-size SLR 11-22mm F4.5-5.6 is the optical system of. In the 35mm single-lens reflex Canon 11-24mm F4 I will be super-wide-angle zoom of the world’s largest angle of view, along with.
Σ According to the patent application of the seem to be designed to be suppressed breathing. Recent TV programs, but Will probably are using the mirror-less, it is unpleasant to watch because it is unpleasant movement of wobbling is noticeable. Pleasant reason to watch the drama and the movie appears to because being edited seriously, why the entertainer is to feel the program is unpleasant to talk and interviews on the street is probably because not been edited almost. It is what you want the future of the lens to achieve a zero-breathing.
Until video work using ultra-wide-angle lens now I did not see too much, and now often seen recently. Perhaps a factor that it is now able to use the super-wide-angle lens of a single-lens reflex, in which the Sigma of 12-24mm F4.5-5.6 Will is also included. Ultra-wide-angle zoom lens of Art line is not only to pixel resolution in super multi-pixel era, it might be that aims to take a video work that is not uncomfortable to watch.