What is the high sensitivity performance of SLR? After watching Nikon D3200, everyone commented that the pixel is high, but the high sense is very general. What is a high sense?

High sensitivity means higher sensitivity.

The abbreviation of sensitivity is ISO, which refers to the sensitivity of photosensitive elements to light. Under the same illumination, the higher the sensitivity, the greater the exposure and the brighter the photo.

So if you want to shoot in a dark environment, higher sensitivity is necessary. On the contrary, in the case of good lighting conditions, high sensitivity performance is meaningless.

Sensitivity is usually based on ISO 100, and the value is doubled with each increasing level, and halved with each decreasing level (there are also half levels, such as 1/3). Raising the grade will double the sensitivity to light, that is, the exposure time can be shortened by half under the condition of constant aperture.

For SLR, ISO 1600 and above usually belong to the category of high sensitivity, while for card machine, ISO800 and above can be regarded as high sensitivity.

The lower the sensitivity, the better the image quality, and vice versa. Therefore, we should use as low sensitivity as possible.

After the sensitivity is improved, the damage to the image quality is generally reflected in color distortion, contrast reduction (gray picture) and noise. The higher the sensitivity, the more serious these problems are. The so-called good high-sensitivity performance means that these problems will not be too serious when the sensitivity is high.

Some top-class SLR's have excellent high-sensitivity performance, such as D3s. Even if they reach ISO6400, the picture is still quite pure.

As for the entry-level D3200, you don't have to expect its sense of advanced. Generally speaking, ISO800 is sufficient to ensure good image quality. In fact, most amateur photographers' photos are below ISO400, so high sensitivity performance is not so important.