This Leica 12564 Lens Hood is a great accessory for your 35mm f/2.8 Elmarit-R & 50mm f/2 Summicron-R lenses. It easily attaches to the front of your lens with its snap-on fastening mechanism. The hood is designed specifically for your 50mm lens with a 50mm front diameter. It is a circular hood that provides shading for your lens, reducing the amount of stray light that enters the lens and causing unwanted glare or flares in your images. This lens hood is made by Leica, a reputable brand in the photography industry, and is in excellent condition, with no visible signs of wear or damage. It is perfect for professional photographers who want to enhance the quality of their images.