

The genius of Rollei, however, was to create the first serious medium-format rollfilm TLR - and to get so much of the design right just about first time, so that the model essentially evolved only in the details for the next fifty years.

This is a little too convenient a story: Heidecke would certainly have been very familiar with the considerable number of large-format TLRs made in the previous thirty years or so and, as my history page outlines, there had been reflex-type cameras around since the mid-nineteenth century. Franke & Heidecke - Rollei TLRs The idea for the TLR is said in some histories to have occurred to Reinhold Heidecke in the trenches in 1916, as a way to take photos over the parapet without exposing the user's head (his arms, perhaps not unreasonably, being regarded as less important).
