Leica DG Sumilux Lens 15mm f/1.7 for M43 Panasonic and Olympus cameras. Extremely sharp, with great contrast and Leica colours, even when the aperture is fully open. Perfect for street photography especially at night. Small, lightweight with an aperture ring. A pleasure to shoot with it. I am moving to full-frame system. $500 firm. You will never regret this purchase. This lens is a gem.