566-579 Iris, 6 colour & cylindrical lens

The Gehmann 566-579 Rear Sight Iris combines a precision adjustable iris, integrated six-colour filter system and advanced cylindrical vision correction in one highly versatile unit. Designed for competitive target shooters, it provides exceptional control over sight picture, light transmission and visual correction, helping to achieve the clearest possible view of the target and sights.

The adjustable iris offers a wide aperture range from 0.5mm to 3.0mm, allowing the sight picture to be optimised for changing lighting conditions while maintaining precise, repeatable adjustment. Six optically flat glass colour filters—Yellow, Light Green, Orange, Purple, Dark Grey and Light Grey—can be accurately positioned to enhance contrast and improve target definition in a variety of shooting environments. The unit can also be used as a standard iris without any filter selected.

Incorporating Gehmann’s innovative 579 cylindrical correction system, this model allows shooters to compensate for diagnosed axial and spherical vision defects directly through the rear sight. This advanced optical correction provides a practical alternative to dedicated shooting lenses, enabling precise visual adjustment without compromising the sight picture.

A locking collar ensures accurate positioning of the reference V-mark, while laser-engraved markings allow repeatable settings. The removable steel threaded connector enables additional accessories, such as the Gehmann 0.0 dioptre, to be fitted when required. Finished with a special matt anti-reflective coating on all internal and external surfaces, the 566-579 minimises glare and unwanted reflections for maximum optical performance.

Compatible with all major target rifle brands via its M9.5 × 1 thread, the unit is supplied complete with an instruction manual.