Update: the price of the lens is $899.
The Sigma 24-105mm f/4 DG OS HSM is one of the rumored new DSLR lenses to be announced in 2014 and yesterday CanonRumors published the first picture of the new lens. The basic specs are: 82mm filter, weigh of 885 grams, lens design: 19 elements in 14 groups (for comparison the Nikon 24-120mm f/4 weights 710g and has 17 elements in 13 groups).
I just received information that the Sigma 24-105mm f/4 DG OS HSM lens is already listed on Sigma’s website:
Sigma 24-105mm f/4 DG OS HSM specifications:
| Lens Construction | 19 elements in 14 groups |
| Minimum aperture | F22 |
| Filter size | 82㎜ |
| Angle of view (35mm equivalent) | 84.1°-23.3° |
| Minimum focusing distance | 45cm / 17.7in |
| Dimensions (Diameter x Length) | φ88.6mm x 109.4mm / 3.5in x 4.3in |
| Number of diaphragm blades | 9 (rounded diaphragm) |
| Maximum magnification ratio | 1：4.6 |
| Weight | 885g / 31.2oz |
Sigma 24-105mm f/4 DG OS HSM lens design:
Sigma 24-105mm f/4 DG OS HSM lens MTF chart:
Additional images:
