Gehmann Iris diaphragm 510 / 0.5-3.0mm

The Gehmann iris diaphragm is a must for many shooters. Does your eye tire quickly, or do you see "fuzz" when aiming? Then your eye is overstrained. By enlarging the aperture diameter with the iris diaphragm, you can see better again. with an extremely compact design, this patented iris diaphragm has an adjustment range of 0.5-3.0 mm (more than double what was previously available) absolutely play-free mounting of the perfectly round iris all inner curves of the lamella segments are precision-ground with diamond grinding pins for a perfectly round iris at all selected settings Material of the iris: hardened spring steel (instead of conventional brass), making the iris extremely robust exact positioning of the aperture at all set diameters via spring pre-tensioning, thus completely eliminating any shift in the point of impact anti-reflective treatment or coating of the metal surfaces in the viewing opening reflections are avoided by lapping radiation and matte black anodizing of the outer surfaces of the metal housing adjustment scale laser-engraved