The relationship between blackness and image quality

The impact on image quality is mainly reflected in three aspects: image density, clarity and color.

1. Density

For negative film: overexposed, the density will be high, commonly known as "the film is thick"; underexposed, the density will be small, commonly known as: the "film is thin". Color reversal film is the opposite of negative film: film and television equipment rental, film and television equipment rental, 13079222782 Jiali, overexposed, the film density is small, the color is light and translucent; underexposed, the film density is high, the color is thick and dark.

2. Image clarity

Speaking of image clarity, you will definitely think of focus. Accurate focus undoubtedly plays a decisive role in clarity. In addition, the clarity of the image exposed is also related, which is reflected in the exposure, the actual aperture size and the shutter speed.

(1) Exposure.

Too much exposure means serious overexposure; or too little exposure means serious underexposure will lead to a decrease in image clarity. Overexposure, film and television equipment rental, film and television equipment rental, 13079222782 Jiali, the scattering of light in the film emulsion layer will cause the contour lines to be softened and not clear enough; underexposure, lacking the necessary density to form an image, will not be able to Reproduce images clearly.

(2) Aperture size.

The same exposure can be achieved by many different exposure combinations. The difference is whether to choose a large aperture exposure combination or a small aperture exposure combination. When a large aperture combination is selected, the range in which deep scenes are recorded more clearly is smaller; when a small aperture combination is selected, the range in which deep scenes are recorded clearly is larger. Photography calls this effect "depth of field."

(3) Shutter speed.

The impact of shutter speed on image clarity mainly refers to preventing camera shake from affecting overall blur when shooting with a handheld camera. People who love taking pictures should pay attention to this.

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3. Color

In color photography, accurate color reproduction requires accurate exposure. Film and television equipment Rental, film and television equipment rental, 13079222782 Jiali, overexposure or underexposure will cause a color cast. Because color film is sensitive to three layers of red, green, and blue photosensitive emulsions, overexposure or underexposure will be affected differently, and the color balance will be destroyed.