The Konica 4/58-400mm is an extremly rare early zoom lens for the Konica AR system (mid-1960s). There's not much information available, but a sample of the lens was sold on e-bay Japan in 2016 for about USD 750.--. The image below is NOT from me. Usually I do not post "stolen" image on my website, but this is an exception - due to the rarity of the lens I cose to keep the image an re-publish it here.