Franziska strip cam
As the air slowly escaped through the capillary at the bottom, the piston moved back towards the left until it triggered the exposure.
According to Neubronner, there were a dozen different models of his camera.
This thought led him to merge his two hobbies into a new "double sport" combining carrier pigeon fancying with amateur photography.
(Neubronner later learned that his pigeon had been in the custody of a restaurant chef in Wiesbaden.) Neubronner began the development of a light miniature camera that could be fitted to a pigeon's breast by means of a harness and an aluminum cuirass.
In a breach of copyright it was shown in German cinemas as part of the weekly newsreel in 1929.In the Franco-Prussian War of 1870, the famous pigeon post of Paris carried up to 50,000 microfilmed telegrams per pigeon flight from Tours into the besieged capital.