The Prakticamat came out after the Topcon Super D, Super RE. Topcon was the first to market with TTL metering.
Originally Posted by Ian Grant
It is interesting to note though that Exakta held a patent for TTL metering in the 1930s, but the technology of the time meant it was impossible to implement.
The thing is, the Edixa of 1954 was the first to use the layout that Pentax copied. Here is a 1955 Edixa Reflex:
Originally Posted by Prof_Pixel
It only lacked the rewind crank. It has been repeated ad infinitum that the Pentax was the first to combine right hand lever wind, pentaprism viewing, center tripod socket and bottom rewind button... but that's obviously not true. Asahi basically took the Edixa design and added their previously invented mirror return system (which was itself modified from the pre-war Praktiflex).
The Nikon F incorporated automatic diaphragm operation, which I would say is at least as important of a feature as the instant return mirror. The Nikon F wasn't the first with this, but it was the first to combine an instant return mirror with an automatic diaphragm (not counting the Miranda C because it used an external PAD mechanism or the Duflex because it was a bit freakish and not successful).
Last edited by Yashinoff; 12-31-2012 at 02:38 PM. Click to view previous post history.