Canon EF 40mm f/2.8 STM -- Lens Sample Photo Archive in photography-on-the.net forums
Canon 40mm f/2.8 STM Review
Writer's Favorite Lens - the Canon 40mm Pancake Lens
Canon EF-S 24mm f/2.8 STM Sample Images | Photography Blog
Canon EF-S 24mm f/2.8 STM Lens Review - Reviewed
Canon 40mm f/2.8 Pancake Lens Review // Dylan M Howell
Canon EF-S 24 mm f/2.8 STM sample photos page 1
You need a pancake lens! Canon 40mm review for travel photography – Finland based travel photographer – Blog About Best Places to Visit in Europe | Engineerontour