Egami spotted a new patent filed by Sigma. The new patent describes a Sigma 35mm f/1.4 lens for full frame DSLR cameras. The new lens in the patent features built-in image stabilization.
Sigma currently has the popular 35mm F1.4 DG HSM lens which is currently priced for $899. This could be the ART version and refer to a Sigma 35mm f/1.4 DG HSM Art lens. The lens has optical design of 11 grup in 13 elements.
See below for the patent details, translated by machine!
Sigma Patent for 35mm f/1.4 Full Frame Lens
Description and self-interpretation of the patent literature
- Patent Publication No. 2014-48488
- Publication date 2014.3.17
- Filing date 2012.8.31
- Example 6
- Focal length f = 35.58mm
- Fno. 1.45-1.68
- Angles of view 2ω = 63.08-58.94 °
- Image height Y = 21.60mm
- The overall length of the lens 135.98mm
- Mod. 300mm
- 13 pieces of 11-group lens configuration
- Two two-sided aspherical
- One FLD
- Rear focus
- Example 9
- Focal length f = 33.53mm
- Fno. 1.45-1.67
- Angles of view 2ω = 66.32-59.89 °
- Image height Y = 21.63mm
- The overall length of the lens 135.98mm
- Mod. 300mm
- 13 pieces of 11-group lens configuration
- Two two-sided aspherical
- Three ELD
- Rear focus
- Anti-vibration (Group 3)
via EG
