Camera obscura is an old concept for old cameras before technological revolution. It depicts the history of photography because of the same concept used in photography. The science behind it is that the object has to be in a dark room so that the height of the camera reflects on the image for a clearer image. It ensures you project the image from a small pin hole or using a lens to widen and increase the size of the object. The reverse-inverted image concept helps to bring out a clearer image. This was the concept used in photographic camera and development of new cameras before the digital era.
The camera obscura was developed in the 16th century after “cubiculum obscurum”, “”, “conclave obscurum” cubiculum tenebricosum and “locus obscurus. The initial use of the camera obscura was without a lens then the introduction of the lens led to the use of the photographic films. The lensless camera was only for homemade use yet the lens uses was for commercial photography.
The main disadvantage was it was not able to reflect on color hence black and white images. The distance between the pinhole and the screen was essential to widen the view of the environment as well as avid usage of bright light which interferes with the smooth texture of the image produced. The image was printed on a special paper to reflect the object.
Camera obscura using the pinhole reduced the size of the hole to increase the size of the image and to improve on image sharpness and enhance on focus. A small pinhole also reduces the size of the image, although the focus is better. Diffraction is the reason behind poor focus.
Remember the mirror concept. This is the same concept camera obscura uses to reflect on the image. To get the correct image, you have to change the part in an inverted position, since light travels in a straight line meaning the image from the lens are always inverted, to get the right image inversion is required. This phenomenon has been disapproved by Aristotle using the pieces of evidence on images from the sun rays appear circular irrespective of the shape of the object. Physicians are still in discovery on the right explanation for this.
The first box camera used this to invent Kodak, the first photographic film with tripod, this tripod is used when travelling alone. The only difference was the shutter speed to help in getting images on transit. It is the camera that was used to get pictures from films and underground images.
Technological innovation has made photography simple and easy. Different gadgets have inbuilt cameras a clear indication of advanced technology on size and lens to improve on focus. It has also seen the real-time view of images seconds after capture. The film had to be filled and no exposure to external light which interferes with the old photographs. This is something of the past; you can store images on internal and external storage gadgets for both soft copy and hard copy viewing, specially lightweight portable computer are not yet popular that time to store these images.