In a magnesium alloy body we find an optical scheme composed of 18 elements in 13 groups with 2 FLD lenses, 1 SLD and 5 aspherical lenses.
Worth mentioning are the Nano Porous coating and a multilayer coating that help contain reflections, ghosting and aberrations in general.
The diaphragm has 12 blades with variable aperture from f/2.8 to f/22.
Focus Breathing is minimal.
The autofocus uses HLA (High-response Linear Actuator) technology and focuses quickly.
The barrel, protected from dust infiltration and water splashes, is compact (88 x 158 millimetres) and light (weighs 995 grams).
Worth mentioning are two customizable AFL buttons and a lock button that prevents accidental movements.
It is possible to mount front filters with a diameter of 82mm and the minimum focusing distance is 40 centimetres.
Available from September 26th at a price of $1500 in the US.