Sigma

Key features:

• Focal length: 24-70mm
• Aperture range: f/2.2-22
• Canon EF mount lens
• 35mm Film/ Full-Frame Digital sensor format
• Optical Stabilization (OS)
• 9 rounded blade diaphragm
• HSM with faster, yet smoother focusing
• Creates beautiful Bokeh 
• Splashproof and dustproof design
• USB Dock compatible

Key features:

• Focal length: 24-70mm
• Aperture range: f/2.2-22
• Canon EF mount lens
• 35mm Film/ Full-Frame Digital sensor format
• Optical Stabilization (OS)
• 9 rounded blade diaphragm
• HSM with faster, yet smoother focusing
• Creates beautiful Bokeh 
• Splashproof and dustproof design
• USB Dock compatible

Key features:

• Focal length: 24mm
• Aperture range: f/1.4-16
• Sony E mount lens
• 35mm film / full-frame digital sensor format
• Hyper-Sonic Motor Focusing (HSM)
• FLD and special low dispersion elements
• Two aspherical glass elements
• Rounded 9-blade diaphragm
• Super multi-layer coating
• Sigma USB Dock compatible

Key features:

• All-metal construction
• Manual aperture ring
• Incredibly compact and lightweight
• Minimum focus distance of only 3.9 inches
• Reproduction ratio of 1:2 for closeup photography
• High-speed, accurate autofocus
• Magnetic lens cap and metal lens hood
• Mount with dust and splash-resistant structure
• Designed to minimize flare and ghosting
• Apt for Sony E mount

Key features:

• All-metal construction
• Manual aperture ring
• Arc-style focus mode switch
• High-speed, accurate autofocus
• Magnetic lens cap and metal lens hood
• Mount with dust and splash-resistant structure
• Designed to minimize flare and ghosting