Description Gehmann 530N Rearsight Iris Iris 0.5 – 3.0mm It is much shorter and adjustable over a wider range of 0.5 – 3.0mm The fixed-seat iris works with individually pin-located tempered spring steel leaves The aim point is precisely maintained through the wider range of adjustment by the introduction of a new system of aperture control operated by varying the pressure of a steel tube against the central aiming ring – this guarantees a perfect circle at any point within the scale Light reflection is kept to a minimum by external and internal matt finishes Gehmann patented it, so it is not available from other manufacturers’ irises Laser engraved indications 1.5x diopter with -4.5 to 4.5 correction which is removable if required (needs 577 adaptor) Black gehmann item #530N oe sku #39659
