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What is a step? Why are exposure settings different now?

Previously, cameras by gay wedding photographers nyc were mechanical, they were able to increase / decrease the exposure parameter by one step in one step (that is, a change in shutter speed by a factor of two or an aperture by 1.4 times – any change corresponds to a change in the amount of light by a factor of two), then there was no greater accuracy required. The standard step “by steps” (in English “stop”) for shutter speed, downward, is: 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1 / 125, 1/250, 1/500, 1/1000, 1/2000, 1/4000 and 1/8000 (all these are fractions of a second, of which only the denominator is usually written); and for aperture it is: 1, 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, 32 (these are also denominators, so f/1.4 is larger than f/5.6). Exactly the same change was therefore invented for the sensitivity of the matrix: ISO 100, 200, 400, 800, 1600, 3200, 6400, 12800, 25600, etc. However, with the advent of electronically controlled cameras (late film models and all digital ones), there was also a need for more accurate exposure, which was already allowed by the exposure meter modules installed in them, and therefore, it was customary to divide each stage into three parts, as a result of which shutter speed, aperture and sensitivity values ​​can now be set more accurately. Today, in some cameras, by the way, you can choose the step of changing the sensitivity in the menu: a step, half a step, or a third of a step. Aperture and shutter speed will continue to change with the parameters set by the camera itself.