The Dienstglas “Service Glasses”
There are two standard types of Binoculars used, Porro Prism – The eye pieces are not inline with the objective lenses, and Roof Prism – The eye pieces are in line with the objective lenses (your looking straight through) this type are much longer then the Porro Prism. Binoculars were fixed (had no focusing ring) if your been attacked, by aircraft for example you wont have time to focus, and you can keep on the target better. The Naval type had light filtering discs inside the eye pieces, to enhance low level or bright light conditions.
Some had sighting reticules (vertical / horizontal lines inside the eye piece) to aid location. The main bodies were made from a special lightweight alloy, some were made from brass, the objective lens covers, screws, frame were made from brass, whilst the eye caps were made from bakelite.
All the binoculars were supplied with a leather or bakelite case, a leather or bakelite cover to protect the eye pieces from rain and dirt, and on the smaller binoculars a leather button hole strap to attach to your tunic (avoids them swinging about whilst in combat). The larger cases were reinforced inside with wood to protect the binoculars. Lots of soldiers covered the binoculars, either with a canvas/splinter type bag, or just simply wrapped in cloth to protect and camouflage them.
6×30 been the standard magnification and were issued to mg units, tank crew, basically any soldat who needed them. Mass produced.
10×50 high quality and wide angled images issued to Artillery, Reconnaissance, Searchlight, Flak, Tank crew
7×50 Navel type, Kriegsmarine, Commanders, Watch crew, there is photographic evidence of the army using these.
Headphones – Dfh.b (Dopplel fernhohrer model B)
Throat Microphone – (Kehlkopfmikrofon)
or from Sept 44 the combined set – Funkhaube (could be worn with steel helmet)