sigma 依支10-18 好似好過tamron 10-20
https://www.sonyalpharumors.com/leaked-first-sigma-10-18mm-f-2-8-images/
Specifications:
Lens construction: 13 elements in 10 groups (3 FLD, 1 SLD and 4 aspherical elements)
Angle of view: 109.7°-76.5° (APS-C)
Number of diaphragm blades: 7 (rounded diaphragm)
Minimum aperture: F22
Minimum focus distance: 11.6 (W) -19.1 (T) cm
Maximum magnification ratio: 1:4 (W) – 1:6.9 (T)
Filter size: φ67mm
Dimensions (maximum diameter x length): φ72.2 mm × 62.0 mm.
Weight: 260 g / 9.2 oz.