What is pinhole photography? History of pinhole photography

A hole, a black box, a film bearing or film passing mechanism is a drawing machine. Obsessed with photography for many years, chasing ideal images in various ways. Finally, at that casual moment, I saw a pinhole image with dark corners and clear knots, such as the time when I galloped away, the paradise I had returned to in my dream, hitting the heartstrings directly ... pinhole photography, an ancient imaging technology. The light passes through the pinhole and reaches the negative in a straight line without being distorted by the glass of the lens, thus forming a unique imaging characteristic: no matter how wide the angle is, it is not deformed; No matter far or near, there is no blur of depth of field. These characteristics have been brought into full play by pinhole photographers all over the world, creating countless wonderful images full of mysterious charm. Nowadays, photographic equipment has developed to the extreme, and it is easy to ask for the extreme picture quality. What fascinates thousands of photographers and even professional photographers? I'm afraid this kind of taste can only be experienced by happy players. Simple equipment structure and simple shooting method have complex plasticity, and its changes spread endlessly with imagination. A hole, a black box, a film bearing or film passing mechanism is a drawing machine. There is no need to focus, just find the right angle and control the exposure time, and everything will be declared complete. (Figure 2) The starting point of pinhole photography in Figure 2 lies in the production or selection of pinholes, and perfect pinholes are the guarantee of quality. The requirements for pinhole are: thin, thin enough to get enough image field. Smooth and complete circle is the guarantee of sharp imaging. Can be self-made, various methods, and many introductions can be found online. You can also buy finished products with pinholes, which is more convenient. The next thing to do is how to make a pinhole camera. Before you do it, you should understand that the image distance (the distance between the pinhole and the substrate) determines the choice of pinhole aperture, and the distance and aperture determine the aperture size, which can be calculated by PINHOLEDESIGNER software. According to these conditions, the correct exposure time can be obtained. The angle of view is determined by the image distance and width. If you want to pursue an exaggerated wide-angle effect, you should choose a short enough image distance or a large enough film width. There are two common ways to play: one is to use ready-made fuselage of various sizes, punch holes in the cover of the fuselage, and stick pinhole pieces on it. The other is to process the cassette itself, so the freedom of image distance is relatively wide, and it is usually suitable for using the ready-made back, because the exposure time is usually long, and the most convenient shutter mechanism is to stick it with black tape. Because the confusion between lens and focus is solved, many wonderful ways of playing can be derived: multi-head pinhole; Surround the negative; Bending negative; Photographic paper is exposed and then copied by contact. In short, as long as we understand the principle, we can create an infinitely changing surreal image. (Figure 3) Figure 3 A manufactured camera has a fixed aperture value, which is usually recorded as a multiple of F22, that is, the speed of F22 metering is multiplied by this value, and the long exposure time should be extended proportionally considering the reciprocity law of the base film. How to shoot the effect, the ultimate goal of plaything is to obtain extraordinary image effect, and the correct direction is to use the essential characteristics of pinhole photography to imagine. Because of the precision of the professional pinhole, the imaging clarity is much higher than that of the homemade pinhole, and it can even be used as a general camera in many cases. Of course, the goal of pinhole photography is not all clarity, but a feeling. For this conventional view image, the control does not need to be very complicated, and the middle distance and content take precedence. (