Much of that is probably due to air-borne dust and dirt that have accumulated on the screen's surface

cinema-quality video cameras

Text Remaster: Yes

while making it easier to wipe off any contaminants or fingerprints that do become attached to the lens surface

Sigma 100-400mm F5-6.3 DG DN OS Contemporary Full Frame Lens for Sony E Mount 750965 Brand_Tamrac Much of that is probablySIGMA 100 400mm F5 6. 3 DG DN OS Contemporary A remarkable optical performance and a full range of functionalities in a compact body for exceptional lightweight shooting. Introducing a long awaited ultra telephoto zoom lens designed exclusively for full frame mirrorless cameras. A Handy Tele Master that empowers your photography vision, anytime, anywhere. A remarkable optical performance and a full range of functionalities in a compact body for