It is surprising, with as modern as our technology is today, how old photography really is. Nowhere is this more apparent than in the history of lenses, specifically. In fact, lenses have been around for through a glass sphere, noting how the shape of the sphere itself changed what he was looking at. Though this experiment is primitive by today’s standards, it was considered a lens nonetheless. Hasan’s experiments led to more experiments with optics and by the 1500s, it was well known by researchers that if you applied an aperture to a lens, the things you would see through that lens would be higher quality. At the time, however, scientists were unaware of why this was. It was only later discovered that an aperture helps to prevent distortion. The next major development to photographic lenses also came in the 1500s with the camera obscura. The camera obscura was essentially a large room with a lens in one wall. As light would shine through that lens, an image of whatever was before the lens was projected onto the wall. Developers of the camera obscura refined lens designs, creating such things as the biconvex lens. A biconvex lens is simply a glass element that curves outward on each side