Raising the ISO and keeping times and diaphragms unchanged increases the brightness of the framed scene, but this at the cost of the appearance of noise and a consequent loss of detail. But what values do you set for ISO?
In optimal light conditions (whether outdoors or in the studio) it is convenient to leave the ISO values at a standard level that is usually 100 or 200 ISO depending on the digital camera.
Try not to ever raise the ISO and find an acceptable solution first by adjusting the aperture and the exposure time, if this is not possible because the light is becoming scarce, imposing too long exposure times, raise the sensitivity to the minimum necessary to have times of Quick release and aperture not too open.
I tell you this because increasing the ISO sensitivity increases the electronic noise, or a greater electronic amplification of the digital signal that causes the appearance of digital grain and chroma noise, ie red or blue dots, the image and consequently it becomes less clear. In some photographic genres that require a high image detail such as fashion photography, ISOs should never be raised.
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Sometimes, however, this effect of grain caused by noise can be used to the advantage in post-production, for example in black and white it can give an extra touch to the photo.
Attention, some cameras with a native sensitivity of ISO 200 can shoot at ISO 100 in extended mode. At 200 ISO the sensor is able to work in optimal conditions and to provide maximum performance, the ability to lower the sensitivity to 100 ISO is simply a convenience for situations with lots of light, where you do not want to change the combination time/aperture for Still Life Photography Los Angeles.
This lowering of the sensitivity is obtained via software, lowering the brightness of the image, in practice it is the same as when recovering overexposed photos with raw camera. This results in less dynamic range and less color matching than a properly exposed photo.
The function of the digital camera that regulates exposure in
Still Life Photography Los Angeles : ISO sensitivity, aperture and shutter speed can be set manually or automatically and can be used as a primary element to adapt others to obtain correct exposure.
Operating on ISO sensitivity, aperture and shutter speed you can find the various combinations that lead to the same exposure with a given lighting situation, but the photograph will be different based on the choices made. The amount of light reaching the sensor, and determine how light or dark the photo will be.
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