The Ihagee Exakta Diamant is a prototype camera from the German manufacturer Ihagee, the firm best known for the Exakta line of single-lens reflex cameras. As a prototype rather than a production model, it never reached series manufacture, which is the central factor shaping its value today.

With only a single documented UK auction hammer result on record — £5,500 in November 2011 — the Exakta Diamant prototype sits firmly in collector-grade territory rather than the user market. Because that figure is wholesale at saleroom level (excluding buyer's and seller's commission), what a Diamant is worth today in 2026 depends almost entirely on provenance, completeness and the bidder pool on the day; a comparable example could realistically sell for a broadly similar five-figure sum or move materially in either direction.