The Corfield 35mm f/3.5 Retro-Lumax is a wide-angle prime lens made for the British Corfield camera system, dating from the era when K.G. Corfield was producing 35mm equipment in the UK. It is a moderate-aperture wide-angle suited to general scenic and reportage use on a Corfield body.

Auction evidence for this lens is thin: a single recorded UK auction hammer result of £94 in March 2023 gives the only firm reference for what the Retro-Lumax is worth at saleroom level. With one data point, the going price today should be treated as indicative rather than established, and clean, fungus-free copies in original caps and case may sell for somewhat more when they appear; rougher examples typically realise less. The market value of British Corfield optics remains a niche collector area in 2026, so realised prices vary widely between sales.