77mm Ultraviolet (UV) Filter — Pro Glass HD MC, Compatible with Pentax SMCP-DA 300mm f/4 ED IF SDM Lens with Hood (21760)

Confirmed compatibility with the Pentax SMCP-DA 300mm f/4 ED IF SDM Lens with Hood (fits 77mm thread). Constructed from resilient optical glass to provide front-element protection. This Pro Glass 77mm HD MC UV filter is a protective ultraviolet filter with multi-coated surfaces and offers 97% passthrough.