Think Mario Testino, and vibrant, sexy fashion photographs – a gleaming Gisele, a paint-smeared Kate, Naomi in a dressing gown – spring to mind. But little is known about Testino’s own tastes in art.

Auction house Sotheby’s sets out to debunk this unknown with Shake It Up, an exhibition and sale of 400 works from Testino’s personal collection. Formed over 30 years, the collection brings together many of the artists that Testino most admires, and whose visual language has helped to inform his world and vision. Directed and designed by the photographer himself, highlights include portrait artist Elizabeth P

Two auctions of international contemporary art on September 13-14 will be followed by an online only sale of photographs collected by Testino. Testino’s own work will also be presented.

Born in Lima in 1954, Testino established the not-for-profit Museo MATE in the Peruvian capital to promote and support culture. Now focused on taking the work of MATE to the next level, all proceeds from the auction will go towards the expansion of the museum’s programme of exhibitions, residences and education initiatives.

“The art world is where I feed,” says Testino. “It opens my eyes to new things and shifts my consciousness.”