Guangdu photography studio

Zero-based photography and exposure sensitivity.

First, know the sensitivity

1. What is sensitivity?

Sensitivity, also known as iS0 value, refers to the sensitivity of the photosensitive element of a random code camera to light. The higher the sensitivity, the stronger the sensitivity of the photosensitive element to light. The lower the sensitivity, the lower the sensitivity of the photosensitive element to light.

2. The value of sensitivity

Sensitivity is directly expressed by "S0+ numbers, such as S0 100, 50200, S0400, S0800… ... The smaller the number, the lower the sensitivity, and the larger the number, the higher the sensitivity.

Second, the sensitivity setting.

1. Generally, there will be an iS0 key on the camera.

(1) After clicking this button,

② Turn the knob on the fuselage to adjust the value of iS0.

2. Suggestions for each scenario

When our source is higher than the S port, it must be in the case of insufficient light. At this time, the aperture must be the largest and the shutter speed must be as slow as possible. If there is no fill light and tripod, the sensitivity can only be increased for normal warm light. There is no other way. The only function of sensitivity parameter is to obtain normal photos at the expense of image quality. Noise is better than no noise.

Iii. Sensitivity effect 1

Function 1: Sensitivity has two main effects on photos: it affects the drinking of photos and the quality of photos.

(1) affects photo illumination. The higher the sensitivity, the stronger the sensitivity of the camera photosensitive element to light. The brighter the photo, the lower the sensitivity. The more sensitive the photosensitive element of the camera is to light, the darker the photo will be.

② For actual use, shooting in the case of sufficient light: the iOS value is basically set to the lowest (50 or 100), so the picture quality is the best.

Fourthly, the second effect of sensitivity.

Action 2

① The higher the sensitivity, the more noise and the worse the surface quality. The lower the sensitivity, the less noise and the better the surface quality.

② The actual use of iS0 is too high, and the image quality is too damaged, which can't be compensated in the later period. So in general, S0 should not exceed 1600 as far as possible (high-end cameras are easy to control, and it is best not to exceed 6400).

Verb (abbreviation of verb) abstract

1. Know the sensitivity and control the sensitivity of the photosensitive original to light.

2. The numerical value of sensitivity is directly expressed by "50+ number", and the comparison is: 50 100, 50200, 50400, S0800… ... The smaller the number, the lower the sensitivity and the higher the digital superelevation sensitivity.

3. Sensitivity effect

(1) affects the photo exposure. The higher the sensitivity, the more sensitive the camera photosensitive element is to light and the brighter the photo is. The lower the sensitivity, the more sensitive the camera photosensitive element is to light, and the darker the photo is.

(2) Affect the image quality, the higher the sensitivity, the more noise, the worse the image quality, the lower the sensitivity and the less noise, the better the image quality.

4. Sensitivity setting. Generally, there is an iOS button on the camera. Click this button, turn the dial on the fuselage, and adjust the iOS value.

5. Suggestions for each scene: sunny day: 100-200, cloudy day: 200-400, rainy day: 400-800, indoor/evening: 800-3200, starry sky: 3200, with a tripod at night 100.