The Zeiss Ikon Ikonta 521/16 (also known as the Ikonta B) is a folding medium-format camera taking 6x6cm exposures on 120 roll film. Introduced in the post-war era, it was positioned as a compact, travel-friendly folder for amateur photographers.

Sales data for the Ikonta 521/16 is very limited, with a single recorded UK auction hammer result of £100 from 2010, so today's market value should be treated as indicative rather than firmly established. At saleroom level these folders typically trade at modest prices, and what a clean example sells for depends heavily on shutter condition, bellows integrity and lens clarity.