see also:

• super wide angle lenses

• the 1st full frame constant f/2 wide angle zoom lens
  • NB. Olympus produced the 1st constant aperture f/2 zoom lenses such as the Olympus ZD 14-35mm f/2.0 SWD lens and Olympus ZD 35-100mm f/2.0 lens but these were for Olympus Four Thirds dSLR system
• announced June 2015 and will be available in Nikon, Canon EF and Sigma SA mounts

• full frame 24-35mm coverage
• f/2-16 but no aperture ring
• 18 elements in 13 groups
• 82mm filter
• bayonet lens hood
• 9 blades
• close focus 0.28cm giving 1:4.4 close up
• internal focus
• 87.6×122.7mm (3.4×4.8“)
• 940g (33.2oz)