Toronto. The Exakta brand is well known in collector and user circles. Exaktas were the earliest 35mm (kine) SLRs and were available new into the 1960s. The Flektogon f/4 25mm lens made by Zeiss Jena was only made for about three years (1960-62) making it far rarer.
The Flektogon was sold for the Exakta mount or a Leica M42 mount. You may be able to find one at our fall fair in a couple of weeks, or as a lot next month in our estate auction. What makes this lens attractive is its ancestry (Zeiss) and extreme wide-angle, especially for an SLR camera design. A retro focus design (reverse telephoto) was mandatory for even many normal lens to clear the camera’s mirror.