Sigma

Key features:

• Focal Length: 18-50mm
• Aperture Range: F2.8- F22
• Lens Construction：10 groups, 13 elements (1 SLD and 3 aspherical lenses
• Angle of View (APS-C)：76.5° (W) -31.7° (T)
• Diaphragm Blades：7 (rounded diaphragm)
• Minimum focusing distance:：4.8 (W) -11.9 (T) in.
• Maximum magnification ratio: 1:2.8 (W) -1:5(T)
• Working distance of just over an inch (2.7cm) from the front element at 18mm
• Versatile focal range and excellent optical performance
• Stepping motor provides swift, accurate, and quiet autofocus
• High-precision, durable brass bayonet mount with dust and splash-resistant structure

Key features:

• Focal length: 18-50mm
• Aperture range: f/2.8
• L-mount lens
• Full-frame and APS-C formats
• 3 high-precision glass-molded aspherical elements
• In-camera aberration correction
• Great choice for a wide variety of uses

Key features:

• Focal length: 18-50mm
• Aperture range: f/2.8
• L-mount lens
• Full-frame and APS-C formats
• 3 high-precision glass-molded aspherical elements
• In-camera aberration correction
• A great choice for a wide variety of uses