Carson's 3D Series Binoculars are phase corrected to ensure bright and sharp images. The 3D Series Binoculars feature the High Definition optical coating technology introduced in our XM-HD™ Series. This technology significantly enhances light gathering capabilities of the 3D Series Binoculars for even brighter, sharper images in low-light conditions.The 3D Series Binoculars have been "Designed" for exceptional user comfort, featuring precisely placed thumb grooves, "just right" texturing and all-over body ergonomics. The advanced optical technology produces enhanced "Depth" and "Dimension."