The IBELUX 40mm f0.85 MarkIII is constructed of 10 elements in 8 groups and 10 blade aperture for smooth bokeh at all apertures. The body is constructed of an aluminum outer barrel, brass core and a stainless mount.
Comparing to former versions：
Version III has totally new coatings both inside and out. What this now means is the lens is much more versatile than it once was, and you can take it pretty much anywhere and shoot pretty much anything without any serious flaring or loss of detail that comes from that