Autumn collecting 2018

As the season’s auctions get under way, we look at the events, people and trends shaping the art market

The contemporary art sale will support Aids programmes in sub-Saharan Africa

The film explores why some artists succeed and others fail in this peculiar ecosystem

Plus: Instagram makes sales at Tefaf; virtual reality in Lagos; Ropac to represent Judd Foundation in Europe

The Turin art fair’s separate venue gives the works the space they need

The photographer stood ‘in the shadow of a great tree’, her husband Henri Cartier-Bresson, but a Paris exhibition aims to change that