Engineering & Technical Division

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At 2012, he Hensoldt division of Zeiss released the Zeiss ZO 4x30i combat gunsight. The new sight, specifically designed as a combat optic for small arms, has a fixed 4x magnification, is robustly built and offers a very wide field of view. This puts it in the same category as the popular Trijicon ACOG series.



The new combat gunsight is based on the Zeiss ZO 4x30 that is in service with the German military aka the German Bundeswehr. While neither the German military nor Zeiss likes to admit it, the ZO 4x30 had been combat tested in peacekeeping missions and the NATO operations in Afghanistan. Zeiss originally developed the ZO 4x30 as the replacement optic sight for the Bundeswehr’s Heckler & Koch G36 assault rifle’s build-in ZF 3x4° sight.



The Zeiss ZO 4x30i retained the same proven optical formula as the Bundeswehr’s ZO 4x30. It features a 30mm objective lens with a fixed 4-power magnification. The ocular lens size is very large at about 35mm, which gives a big and highly detailed sight picture. The exit pupil is 7.5mm and that is bit larger than the average 5-6mm offered by most of the riflescopes. The eye relief is comfortably at 2.56 inch or 65mm. The internal adjustment system offers 20 mils of adjustments on both the vertical and horizontal axis. Each click of the turrets is 0.2 mil of adjustment.



The biggest improvement over the old build-in ZF sight is doubling the field of view (FOV) from 4 degrees to 8 degrees on the ZO 4x30/4x30i. That had practically increased the viewing area by 10 times through the optic. 8 degree FOV covers 42 feet at 100 yards.



The “i” suffix in new Zeiss ZO 4x30i version stands for illumination. That was added because the German military didn’t want in illuminated reticle for the original version. The newly added illumination system is powered by a single AA battery. Interestingly, the ZO 4x30i’s illumination system is capable of regulating the battery voltage from 1.2 volt (rechargeable AA battery) to 3.6 volt (industrial lithium cells in AA size). The battery life is rated for 800 to 1200 hours per AA battery. There are 6 daylight illumination levels and 3 dedicated night-vision settings.

By Timothy Yan



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