Using the above formula, I calculated the optimum film tighness (FT) to achieve maximum film flatness (FF.) After an in vain attempting at contacting the mechanical engineers at Eho-Altissa, I constructed the required slip-drag clutch in my home machine shop.  It is pictured to the left. The assembly required two identical clutch plates to avoid uneven horizontal film tightness across the width of the film.

The new clutch assembly produced an increase of .2 inch ounces required to advance the film. Obviously this improved film flatness by 2.873 FFP's. A significant increase.

The film rollers were removed and machined on a Sylvester and Tweety Model 52 precision lathe. A Bugs and Fudd subminiature vacuum pump was installed to remove all air from the film chamber. Overall film flatness increase was 3.2134 FFP's.

The full takeup roll was much tighter after the work noted above. However the Altissa revealed itself to be simply a cheap camera with a pretty face. Many men have fallen for such a combination.

I think I'll try some portraits with it, someday.