Sigma Patent for 15-30mm F1.8, 17-35mm F1.8, 16-50mm F2.8, 12-24mm F2.8 Lenses

Egami spotted new patents filed by Sigma. The patent describes several new ART series wide-angle zoom lenses for APS-C sensored DSLRs.

These lenses are Sigma 15-30mm F1.8, 17-35mm F1.8, 16-50mm F2.8, 12-24mm F2.8. Like all patent news we have to say these lens names doesn’t mean they will all going to be announced.

However we can say that Sigma is working on high quality ART Series wide-angle zoom lenses for APS-C format DSLR cameras.

Sigma Patent for 15-30mm F1.8, 17-35mm F1.8, 16-50mm F2.8, 12-24mm F2.8 Lenses

Sigma 18-35mm f/1.8 Lens

Here is a list of upcoming new Sigma Art series wide-angle zoom lenses :

15-30mm F1.8 DC HSM
17-35mm F1.8 DC HSM
16-50mm F2.8 DC HSM
12-24mm F2.8 DC HSM

Description and self-interpretation of the patent literature

Patent Publication No. 2014-89365
- Publication date 2014.5.15
- Filing date 2012.10.31

Example

embodiment
Example	Zoom ratio	Focal length	Fno	Angle of view	Length
One	1.82	18.60-26.02-33.78	1.86-1.86-1.86	76.12-56.68-44.80	168.50-168.50-168.50
Two	1.84	18.50-23.97-34.00	1.86-1.86-1.86	76.59-61.06-44.54	163.25-162.61-166.00
Three	1.88	15.44-21.97-29.11	1.86-1.86-1.87	86.78-65.35-51.12	166.00-160.90-161.03
Four	1.94	17.50-24.98-34.00	1.86-1.86-1.87	79.70-58.89-44.53	165.52-161.31-163.21
Five	2.95	16.45-30.01-48.50	2.89-2.90-2.91	83.22-49.80-32.03	169.00-151.78-152.70
Six	1.87	15.50-22.03-29.00	1.86-1.86-1.86	86.43-64.77-51.29	163.50-163.50-163.50
Seven	1.86	12.42-16.88-23.16	2.89-2.89-2.90	99.06-79.32-62.02	166.00-166.00-166.00