Samyang Rear-mount ND-2x, ND-4x and Skylight filters for Samyang 500mm MC IF f/8 Telephoto Mirror Lens Filter (M=30.5) serves as a general protective filter to leave on lenses at all times. Filters help to reduce dust and moisture from reaching your lens element and provide additional protection in case of drops or situations where scratching could occur.
Reviews Samyang Rear-mount ND-2x, ND-4x and Skylight filters for Samyang 500mm MC IF f/8 Telephoto Mirror Lens Filter (M=30.5)