1. Long exposure photography- is the quantity of light reaching a photographic film, as determined by shutter speed and lens aperture.
2.Light painting- is a photographic technique in which exposures are made by moving a hand-held light source or by moving the camera.
3. Solargraphy- are pinhole photographs taken with a lensless pinhole camera with a long exposure.
4. Calotype0-early photographic process: a 19th-century photographic process producing a negative on a plate wetted with silver iodide
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