Do wars advance the technological progress? 

If we start to learn numerous inventions, the first thing which is similar to many of them is that they were created because of the need due to the war. The same things concerns spy cameras. In 1943, during World War II, both Axis and Allied intelligence agents started to use the professional spy cameras. Of course, those patterns were not so perfect as the modern models, but the information, which they contain was very precious sometimes.

So, Minox can be called the first among the various spy camera manufacturers. Nowadays this company still exists, but its goods are not only for intelligence actions against some countries. Nowadays even ordinary people can buy dome spy cameras. Just in order to protect their houses, business, members of the family.

Does the quality of the cameras depend greatly on the spy camera manufacturers? Of course, it is better for you to buy the models at the companies which have already established a good reputation. For example, Sony, Toshiba, Panasonic. Of course the prices on their goods are expensive in comparison with others, but you may be sure in the high quality of the product.

Chinese spy camera manufacturers offer rather cheap products, but it doesn't mean that their models will not work or something like this. Everything depends on advertising and such famous spy camera manufacturers as Philips or Sony just inflate prices because of popular brand.

Of course, we all know about different security spy cameras, see them in our local shop and so on. So, there is nothing surprising for us in these surveillance spy cameras. But what can you tell me about the spy cameras which are installed in sun glasses? Does it seem to look like a film? Of course, we all have seen such things a lot of times in different sci-fic films about this. But nowadays Chinese spy camera manufacturers just offer you this model for entertainment... or for work. Probably our world really has become more interesting!