Zeiss Ikon Ikonta 521/16 (Ikonta B, Opton)

{"overview":"The Zeiss Ikon Ikonta 521\/16 (Ikonta B) is a folding medium-format roll film camera taking 6×6 cm exposures on 120 film, produced by Zeiss Ikon in the post-war era. Variant and lens configuration — particularly whether the camera carries an Opton Tessar — drives much of the spread in what the model sells for.","buying_guide":"Inspect the bellows carefully for pinholes by shining a torch inside a darkened room, as leaks are the most common fault on folders of this vintage. Check that the shutter fires accurately at all marked speeds, the rangefinder or viewfinder optics are clear, and the folding struts lock firmly without play.

Generated summary, 24 Apr 2026 — not checked by hand; prices on this page come from the sales, not from this text.