Nikon D5600 Reference Manual - Page 235

A The Photo Shooting Menu [ISO Sensitivity Settings] Option ISO sensitivity can also be adjusted using the [ISO sensitivity settings] item in the photo shooting menu. A High ISO Sensitivities The higher the ISO sensitivity, the less light needed to make an exposure, allowing pictures to be taken when lighting is poor and helping prevent blur when the subject is in motion. Note, however, that the higher the sensitivity, the more likely the image is to be affected by "noise" in the form of randomly-spaced bright pixels, fog, or lines. • "Noise" can be reduced by enabling high ISO noise reduction. High ISO noise reduction can be enabled using the [High ISO NR] items in the photo and movie shooting menus. A Hi 0.3-Hi 2 A setting of [Hi 0.3] corresponds to an ISO sensitivity approximately 0.3 EV higher than ISO 51200 (ISO 64000) and [Hi 2.0] to an ISO sensitivity approximately 2 EV higher (ISO 204800). Note that pictures taken at these settings are particularly prone to "noise" in the form of randomly-spaced bright pixels, fog, or lines. A Lo 0.3-Lo 1 The settings [Lo 0.3] through [Lo 1.0] correspond to ISO sensitivities 0.3- 1 EV below ISO 100 (ISO 80-50 equivalent). Use for larger apertures or slower shutter speeds when lighting is bright. Highlights may be overexposed. In most cases, ISO sensitivities of ISO [100] or above are recommended. Shooting Settings 189