Postwar and Contemporary Photographs auction today at Sotheby's

Cremaster 2: The Executioner's Step (1999) by Matthew Barney. Estimate $25,000 — 35,000

Thanksgiving 1984 (Table) [2009] by Roe Ethridge. Estimate $6,000 — 9,000

'The Schäfer Family, Düsseldorff [1990] Thomas Struth. Estimate $8,000 — 12,000

Pflanzen, Nr. 22, 35, 67 and 70 [1992-93] Thomas Struth. Estimate $10,000 — 15,000

Iberia Quarries #8, Cochicho Co., Pardais, Portugal [2006] by Edward Burtynsky. stimate $10,000 — 15,000