The Carl Zeiss DF and EDF was used by all branches of the NVA including the LANDSTREITKRГ„FTE, VOLKSMARINE, LUFTSTREITKRГ„FTE/LUFTVERTEIDIGUNG, GRENZTRUPPEN and the forces of the MdI. The EDF also contains a detector for active infrared sources. The EDF was built in 2 versions: The standard EDF 7x40 was equipped with a radioactive reticle illumination, the EDF 7x40 oB without illumination. Carl Zeiss Jena Camera Lenses, Carl Zeiss Jena f/2.8 Camera Lenses, Carl Zeiss Binoculars, Carl Zeiss Jena f/2.8 Vintage Camera Lenses, Carl Zeiss Jena Vintage Camera Lenses, Carl Zeiss Binoculars and Monocular, Carl Zeiss Binoculars and Telescopes, Carl Zeiss Marine Binoculars, Carl Zeiss Military Binoculars & Monoculars, Carl Zeiss Jena Fixed. Carl Zeiss engineers came up with a more compact roof-prism design, employing a split doublet objective and a five lens ocular construction. The DF in NVA and Grenztruppen service was an optimal performer for watch tower surveillance but at 1.2 Kg, a challenge for soldiers to carry around under combat conditions. The 7x40 DF (Doppel-Fernrohr) was introduced in the 1960s and was the first binocular built by Carl Zeiss Jena from scratch since the days of WWII. Carl Zeiss engineer's main aim in the EDF design was to build a binocular with same qualities as the DF, but at a lower weight and smaller size. The EDF 7x40 was designed as the successor of the DF 7x40 and introduced in 1981. It was forbidden for East German soldiers to rest the DF 7x40s on vehicles, indicating some measure of their value and the resources involved in manufacture. The DF binoculars were to be carried according to NVA regulation 'at the man'. The DF in service use, featured a leather strap attached to the central joint of the binoculars so the DF could be fastened to the soldier's uniform so there was some measure of stability while the soldier was moving. The eyecups are made of soft rubber and fold in so that the binocular can be used with gas-mask or glasses. These yellow filters are stored inside the of the plastic ocular cover. There are yellow filters for use under hazy weather conditions. The DF features an extremely robust and armored body, a ranging reticle which can be illuminated by a battery powered device and a detector for active infra-red sources, which is charged by the UV contribution during daylight. The DF is regarded by experts as the finest binocular ever made in Jena. The DF 7x40 was produced during the 1960s/70's by Carl Zeiss Jena for the East German NVA.

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