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Message: <blockquote data-quote="Binastro" data-source="post: 3316507" data-attributes="member: 111403">Some Zeiss optics have both Aus Jena and Carl Zeiss on them, but hidden.Pentacon 6 Lenses.50mm and 65mm Flektogon.80mm and 120mm Biometer.180 and 300mm Sonnar.500mm f/5.6, actually 500mm f/4.8. Mine had astigmatism or pinched optics or both. Zeiss?Some were Meyer, such as 80mm f/3.5?If you remove the front bezel saying Aus Jena, behind it, it may say Carl Zeiss or C.Zeiss.There were some cameras such as No Name Contaxes, which had no name.I expect the guy who called the binocular Flektogon to have another one called Biometer.He would not be brazen enough to have a Sonnar, I think.I think £100 is pretty reasonable for this binocular.Anyone buying binoculars as a long term investment will probably lose, as in the long term they lose value in real terms, except for rare exceptions.Just enjoy using them.</blockquote>