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Pinhole cameras are made without a lense. The image is formed through a tiny hole, which replaces the lens. Exposures are long, ranging from half a second to several hours. The images are softer, less sharp, than pictures made with a lense, the depth of field is always from the nearest point up to the infinity. Photojournalists normally use 35 mm SLRs in their work, portrait photographers often use medium format cameras, for architecture and landscapes a viewcamera is probably a good choise.
Also in pinhole photography some subjects are better than others. A special potential is the infinite depth of field, rectilinear ulta wideangle and the softness of images.