How to use a SLR camera

To explain your problem, we should first introduce the concept of EV value, which is a quantity reflecting the exposure. Initially defined as: when the sensitivity is ISO 100, the aperture coefficient is F 1, and the exposure time is 1 s, the exposure is defined as 0, and the exposure is reduced by one step (the shutter time is halved or the aperture is reduced by one step), and EV+65438. Increase exposure by one step (double shutter time or increase aperture by one step), EV- 1. When using SLR, you need to consider EV value (to ensure the correct exposure of photos), safety shutter (no patch) and depth of field (clear distance of the scene).

Iso sensitivity is a measure of the sensitivity of traditional camera negatives to light. Increasing the ISO value is more used to obtain a safe shutter when taking pictures with hand-held cameras, but the higher the ISO value, the more noise there is. On the premise of obtaining clear photos, try to use low ISO. Minimum ISO value of a camera placed directly on a tripod.

The aperture is the opening size of the lens blade, and the F value is inversely proportional to the aperture size. The lens determines the maximum and minimum aperture, usually indicating the maximum or constant value, and the minimum can only be known from places such as official website or digital websites. We usually pay attention to the influence of aperture on depth of field, Jiao Wai blur and safety shutter. Those who pass physics can learn depth of field by themselves, otherwise the first two will depend on their own or others' experience. As for the value, it depends on the theme you want to express.

The shutter, the reflector in the SLR rises, and the sensor begins to receive light. The length of receiving time is the shutter value. You must know how to calculate the safety shutter when holding a photo, otherwise the photo will be blurred. Look at the pictures of "high-speed shutter photos" and "slow shutter special effects" respectively.

Exposure, in shooting, more refers to the exposure coefficient of the picture with normal brightness, which is the EV value mentioned above. There is exposure compensation in the SLR. Simply put, when the camera exposure is inaccurate, we can use this to tell the camera whether the exposure should be bright or dark. It's been agreed how to adjust it.

File, what program do you need the camera to shoot now? I have to say that the automatic gear is fully automatic, the SLR is as convenient to operate as DC, and then the S gear is the shutter priority. You can choose the required shutter speed (exposure time) and ISO value, but the aperture size is automatically determined by the camera according to the metering system (a value that can be exposed correctly), and the A file is aperture priority. You decide the aperture size (depth of field or sharpness) and ISO value, and the camera will automatically determine the appropriate shutter speed according to the metering system. Adjust at will, without affecting other parameter settings.