Sony has just extended its flagship G Master lens series with an important new fixed focal length: The new Sony SEL400F28 GM lens weighs only 2.8kg and is thus approx. 1 kg (!) lighter than its counterparts from Nikon/Canon. The E-Mount G Master 400mm f2.8 equipped with optical image stabilization should make sense especially for sports and wildlife photographers travelling with the Sony Alpha 9 or Sony Alpha 7RIII.
The weight reduction can be attributed to the megnesium alloy housing, reduced optical elements in the head of the lens and three new fluorite elements.
With the new G Master 400 mm f2.8, Sony refers to an especially fast working autofocus, for which two newly developed High Speed XD (extremely dynamic) linear motors are said to be responsible. For those who want to refocus manually, Sony offers a so-called Full Time DMF function for the 400, which can be used to intervene accordingly. 3 selectable modes optimize the lens functions for various application scenarios, e.g. for continuous object tracking etc.
This is the Sony G Master 400 mm f2.8 promotion clip:
The aperture of the new Sony G Master 400 mm f2.8 consist of 11 blades, filters are operated with a diameter of 40.5mm.
The Sony G Master 400 mm f2.8 (SEL400F28 GM) should be available from September 2018.
Price will be at 12,000,- Euro