The Zeiss Ikon Ikonta 521 (Ikonta A, horizontal) is a folding rollfilm camera produced by the German manufacturer Zeiss Ikon. It belongs to the Ikonta family of self-erecting folders introduced in the pre-war and post-war era, aimed at amateur photographers wanting a compact medium-format camera that folded flat for travel.

Auction data for this specific Ikonta 521 horizontal variant is extremely thin: the only recorded UK saleroom hammer result on file is £130 from 2008, so a current 2026 market price cannot be reliably stated. Buyers asking what an Ikonta 521 is worth today should treat that figure as a single historic data point rather than a guide to what the camera sells for now, and check current auction listings for fresh comparables.