All around PO 4x17 is the most useful and versatile optic of the three. It is very lightweight, has a highly effective reticule and can be mounted on almost any rifle because of it's picatinny clamp. To me this is a must have optic for the AK74 or 223 / AK101 owner. Kashtan is highly collectible and a very fine optic indeed, but for the average shooter PO 4x17 will be the better choice
From 1973, Carl Zeiss made a range of lenses with a bayonet mount for Yashica and Contax 35mm SLR cameras, in partnership with Yashica Camera Co. Ltd. The resulting Zeiss T* lenses were made both in Germany and under license in Japan, and developed a reputation for superb optical quality. Kyocera , which acquired Yashica, later partnered with Zeiss to introduce still other Zeiss T* lenses, including rangefinder and autofocus-mount models. In 2005, Kyocera ceased all camera production and discontinued the marketing of Carl Zeiss lenses.
The following decades brought some radical shifts in city planning. During the 1960s, another part of the historic city centre was demolished to build the Jen Tower . The Eichplatz in front of the tower is still unbuilt and its future is still the subject of ongoing heated discussion. Big Plattenbau settlements were developed in the 1970s and 1980s, because the population was still rising and the housing shortage remained a perpetual problem. New districts established in the north (near Rautal) and in the south (around Winzerla and Lobeda). The opposition against the GDR government was reinforced during the late 1980s in Jena, fed by academic and clerical circles. In autumn 1989, the city saw the largest protests in its history before the GDR government was dissolved.