The Zeiss Ikon Ikonta 521 (Ikonta A, vertical) is a folding roll-film camera produced by Zeiss Ikon. It uses 120 roll film in a vertical-format folding body, positioned as a compact travel camera in Zeiss Ikon's pre- and post-war Ikonta range.

Auction data for this model is extremely thin: a single recorded UK saleroom hammer result of £125 from 2003. With only one data point on file today, there is no reliable median or range to quote, and the price a clean Ikonta 521 sells for in 2026 will depend heavily on cosmetics, shutter function and bellows condition. Buyers should treat that figure as historical context rather than a current market value.