86mm C-PL (Circular Polarizer) Multicoated Multithreaded Filter for Pentax K-20D

Multicoated circular polarizer made for the Pentax K-20D — 86mm slim filter using heat-treated optical glass. Durable black metal filter ring provides a rugged mount while the thin profile reduces the chance of vignetting on wide-angle setups. Light attenuation ranges between 2.3 and 2.8 (approx. +1.3 stops). Multithreaded construction lets you stack additional filters or attach lens accessories; suitable for both video and still photography.