The Lens I've Wanted for So Long. Leica 50mm f2 Summicron-M Review
Leica 50mm APO-Summicron-M ASPH f/2.0 review, sampel photos and interview with the lens designer Peter Karbe - Thorsten Overgaard's Leica Photography Pages
LEICA 50mm f/2 SUMMICRON-M (1979-today)
Thorsten Overgaard's Leica Photography Pages - Leica 50mm Summicron-M f/2.0 Rigid Series II samples, review and article