WHAT I LIKE
Build quality: top! No complaints.
Its large aperture: F / 1.4 can save you in bad light conditions.
Its bokeh: thank you to its openness and its optical formula (13 elements in 11 groups, etc.)
Its distance Focus: 15cm. That makes almost a macro lens.
His dive, its rendering: no need to comment.
His WR: So it is weather resistant. Do not throw it when not even the sea.
Its AF: fast and accurate.
NOT WHAT I NAIME
Its price: despite all its qualities, its price is hefty. Count 1,000.
Its weight: it falls well in hand and is comfortable to lusage but slightly unbalance the device to washing.
Its diameter: 67mm and therefore expensive filters (± 50 for a neutral filter of good quality).