23mm · f/3.5
The Rexagon 23mm f/3.5 Automatic is an obscure ultra-wide lens from the 1960s-70s, likely rebranded (e.g., Soligor). Optical quality is considered poor, described as "crap" (Attila). Build is typical of the era with a PK or T-mount. It may suit collectors of rare lenses but not those seeking sharp results.