For Nikon AF 24mm f/2.8D( manual focus). For Nikon 28mm f/2( manual focus). For Nikon 24mm f/2.8. For Ai 24/2.8. For Ai 28/2. For Ai 35/2.8 PC. Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens.
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