"In the 1940's the Steineck ABC Wrist Watch Camera was the first camera watch sold in America until the last 1950's. It looked like a wristwatch but didn't function as one. It was popular for its time with private investigators. From the 1940's all the way until the 1960's a Minox Spy Camera was known though out the world for being a miniature spy cam in its own category. Many country's intelligence agents and spies used these cameras because they are well known for taking great up close document photographs, yet it was so small no one could see it. These cameras worked so efficiently that the purchase in most countries was banned, only being allowed to be purchased by government agencies and military intelligence personnel. In the late 1960's they became publicly available. Now we are in the digital age where there isn't a need for film processing, making it faster to get your pictures. The resolution is generally many times better than the average film camera. It is common for cameras to have about 5-12 mega pixels which gives you a detailed picture. You can also purchase easy to use photo editing software that makes it possible for you to adjust the brightness, contrast, color, and size. Speaking of size, the size of your camera may be a huge issue. You can get a digital camera specially created so small that it can be disguised easily. There is a large market of high quality digital cameras on the market that are disguised at pens, lighters, and most cell phones have camera built it. You can purchase a surveillance video camera with a built in charge coupled device (CCD) board camera. This will give you high quality resolution. Miniature CMOS cameras are quite popular because they can be wired into a portable DVR that small enough to fit easily in a jacket packet. "