The BBC has made a short video featuring many iconic images made with Leicas and a commentary by long time user Tom Stoddart.
http://www.bbc.co.uk/news/magazine-27516384
An interesting fact which I only discovered a few days ago is that Leica camera does not own the rights to the famous red Leica dot. A few years ago, the original Ernst Leitz company was split into three separately owned entities, microscopes, geosystems and optics (cameras and binoculars). It is the geosystem division which owns the rights to the red dot and the camera company has to licence it. That must be the reason why the cameras are so expensive***.
* Leica camera is actually something of a tortology. The camera was created by Oskar Barnack**** who worked for Ernst Leitz, which until then was solely a microscope manufacturer. The name is actually a shortening of Leitz camera. Had the the Germanic form of camera which starts with a "K" been used, it should have been LeiKa (in German, nouns start with a capital letter), but for marketing reasons the company opted for Leica.
** Leica still has the Ur, which it keeps hidden away deep in a secure vault and few people get to see it, with a replica being used for public display. For many collectors it is the holy grail of cameras and In the extremely unlikely event that it was ever put up for sale would fetch millions.
*** The lenses do not have the red dot, so there must be another reason to explain their high cost.
**** Oskar Barnack originally made the Ur for himself as he wanted something lightweight which he could take with him when walking. Barnack went on to refine the camera through several iterations before the first commercial model, the Leica 1, was introduced in 1925. It would have been sooner, had not WW1 intervened.
