Featuring the high transmittance required of optical devices whilst combining greater hardness than chemically strengthened glass and greater flexibility than sapphire crystal glass, the highly protective sigma wr ceramic protector filter is constructed...

The sigma wr ceramic protector filter is constructed from clear glass ceramic, an extremely tough crystallized glass, resulting in a highly protective clear glass filter'. '.strtoupper('t')he advanced construction, with its outstanding strength, features...

The sigma wr ceramic protector is a highly protective clear glass filter constructed from clear glass ceramic, an advanced material with outstanding strength'. '.strtoupper('a')n extremely tough type of crystallized glass, it features the high transmittance...