The lens' optical formula includes 11 elements in 9 groups, with 1 ED lens, 1 aspherical lens, and 2 high-refractive lenses. It also features nano-coating, and the aperture has nine blades.
The lens' optical formula is made up of 12 elements in 10 groups, with three ED elements and two aspherical lenses. It has a 7-bladed aperture. It weighs 213g (7.5oz) and is 5.7 cm (2.25") long.
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