What is Sony A200 SLR PASM file?

Generally speaking, it is a simple, fast and reliable method to choose the automatic exposure mode of P-file program. The specific method is as follows: When shooting indoors in low light, the built-in flash of the camera will automatically jump up for standby. If you want to shoot in pure natural light, you can turn off the flash, which will automatically combine into "big aperture and fast speed" as much as possible to prevent the image from blurring at slow speed; When shooting in outdoor strong light, it will combine a smaller aperture with a higher shutter speed. At this time, you can turn on the built-in flash of the camera and use it as an auxiliary light for people when shooting in backlight. Some cameras also have an automatic exposure mode of "small aperture, low speed" in the P-file program.

A-stop aperture priority mode:

A-stop aperture priority mode is also an automatic exposure combination with depth of field priority. In photography, this method is adopted by most photographers. Because when selecting files, you can control the depth of field by adjusting the aperture size to show the relationship between virtual and real works. For example, when taking landscape photos, using a smaller aperture (above F 1 1 or above F 16) can make all the scenes in the picture very clear and the imaging quality of the picture is also very high; If it is necessary to highlight the subject and blur the background when shooting close-ups of portraits or other scenes, you can set a larger aperture to shoot. As for the exposure control, there is no need to worry, because in the process of adjusting the aperture, it will automatically track and set the corresponding shutter speed with the change of the aperture size to ensure accurate exposure.

S speed priority mode:

S-speed priority mode is generally used when shooting moving or high-speed moving objects. This mode requires a high-speed shutter to capture clear moving moments without a large depth of field. For example, when shooting track and field, ball games and other sports events, the shutter speed should be at least 1/250 seconds or 1/500 seconds or even faster to ensure the clarity of the instantaneous image; You can choose the shutter speed of1125 seconds or so in news interview to avoid fuzzy influence.

M-range manual control mode:

M-mode manual control means that the shutter speed and aperture size are manually adjusted, and the action is a bit complicated, which is not as convenient as P, A and S modes and is not easy to capture, so it is rarely used at present. You only need to use the flash as the auxiliary light to shoot the backlit portrait in natural light, and the natural environment requires accurate exposure; Or shooting portraits under night light requires both proper exposure of the face and correct exposure of the night background. This requires taking into account the flash index and the distance between people, taking into account the aperture size and the appropriate shutter speed to achieve the best of both worlds.

A: 60% standard inert documents

S: 15% school sports meeting or shooting birds with small guns.

25% HDR, night scene, long exposure

P: 0%