The "Circular-Pol" filter is, as the name suggests, a so-called circular and polarizing filter, and hence can also be used with single-lens reflex cameras, without interfering with the auto-focus adjustment or the TTL light metering. This filter is for that reason suitable without reservation for all analog and digital viewfinder and single-lens reflex cameras, with or without auto-focus.
Saw these in my local Currys and Currys Digital. Can't see them on website. usually cheap at £12.99
Had 58mm and 52mm