At first, the SLR was used, and the parameters were difficult to adjust, and the shutter had to wait for a long time. How to adjust the aperture focal sensitivity? What are the fixed rules among them?

The first lesson of SLR is photometry and exposure. Obviously, you didn't listen carefully. Haha, because your shutter speed is too slow, the shutter has been waiting for a long time. Turn the wheel next to the shutter button clockwise, and you will see that the shutter speed parameter becomes larger. The average novice suggests that the shutter speed should be at least 80- 125. If it is sunny outside, ISO 100 is fine, and ISO is the sensitivity. Generally speaking, the larger the aperture, the better. The smaller the numerical value in the aperture parameter, the larger the aperture and the smaller the numerical value. In the lower center of the camera viewfinder, there is a dense horizontal column display (this is a photometer). When you really set the shutter to the position detected by the photometer, your photometer pointer will point to the central position. If you really can't find it, there is a relatively simple way. First, focus with automatic gear, and then press the shutter half. At this time, the camera will automatically measure light and calculate the shutter speed. At this time, you write down the camera parameters, such as ISO number, aperture number and shutter number. After a few times, use M to adjust yourself. Next time, you will remember how to expose yourself in this light. Let's start with the law. Or effective

1, sensitivity (ISO): As the name implies, sensitivity is the degree of sensitivity to light. The greater the value, the more sensitive it is to light. The more sensitive you are to light, the faster your shutter speed will be, but the quality of your photos will also decline, because the higher the ISO, the higher the noise of your photos will be. But if you need to highlight the ambient light, the sensitivity is also improved.

2. Aperture: It first controls the amount of light entering. The larger the aperture, the greater the light input, which can shorten the long exposure time, that is, improve the shutter speed, and the aperture also controls the depth of field, that is, blur. The larger the aperture, the smaller the aperture, and the Jiao Wai will be cleaned.

3, focal length: some lenses are not constant aperture, then your aperture will change with the change of focal length, so since the aperture has changed, the shutter speed will definitely change. And the greater the focal length, the closer to the subject, the more prominent the depth of field, that is, the better the Jiao Wai blur.

4. Shutter: Shutter speed is also your exposure time. Generally, the great god will not let his shutter speed be lower than 40. There is no shelf. But sometimes it takes a long exposure, such as the night view of the city, for example, if you want to shoot the streamer of the car lights at night, for example, if you want to shoot the water into satin, you must use the shelf+slow shutter.

If you have time, I suggest you go online to find out the skills of metering and exposure of SLR cameras. You should make up for it. Ha ha. I hope my answer is helpful to you.