The Zeiss Ikon Simplex 511/2 is a folding film camera from the German maker Zeiss Ikon, formed in 1926 from the merger of several earlier German camera firms. It was positioned in the entry-to-mid tier of the company's pre-war roll film range.

Sales data for the Simplex 511/2 is extremely thin: a single UK auction-hammer result on record sold for £167 in 2003, and no recent saleroom comparables are available to establish what one is worth today. Without further hammer prices, a reliable current value, price range or median cannot be quoted, and any figure circulated online should be treated with caution.