Between SFTOO and SQTOO, a 28 cm viewer

[Pecole]

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I had always been surprised that Leitz had provided frame/sport viewfinders for the 20 and 40 cm Telyt mounted on the camera through TZOON/TXBOO extension tubes (SFTOO and SQTOO), and nothing for the 28 cm focal length. When mentioning that to a Leitz representative in the mid-1980s, I was told that the company had made frames on special requests, that could be mounted en both existing viewfinders. A few years later, I was lucky in acquiring such a modified SFTOO from a professional photographer who had just switched to reflex cameras. Here is the photo of the 28 cm viewfinder between its two forerunners.