The role of various parameters of the DSLR

Answer 1

The following are the common parameters of the DSLR and their functions:

** 1. Focus related parameters **
1. ** AF-ON (autofocus start button)**
- It can be set to switch between single focus, autofocus, and servo-autofocus. When taking photos, you can directly use this button to select the focus mode, which is convenient to adjust the focus mode according to different shooting scenes and objects. For example, you can choose single focus when shooting still objects, and you may need to use servo-autofocus when shooting dynamic objects.
2. ** M-GN (multi-function button)**
- It can be set to drive mode, focus mode, white balance, light measurement mode, etc. During the shooting process, the button could be clicked to switch the settings at will, allowing the photographer to quickly adjust the shooting parameters to adapt to different shooting needs.
3. ** AF-M (autofocus and manual focus mode)**
- Usually, it was set to AF-autofocus mode, and the camera could automatically adjust the focus. However, when the light at night is too dark and the contrast of the snow in winter is low, the camera may not be able to accurately autofocus, or when you need to deliberately use manual focus to shoot a blurry effect (such as shooting at night), you can switch to M manual focus mode.

** 2. Image display and confirmation of relevant parameters **
1. ** Depth of field button **
- It could be set to a photo style. Through this setting, one could use this button to choose whether to shoot a portrait or a landscape. Different photo styles would affect the color and contrast of the picture.
2. ** Image confirmation **
- After the photo is taken, it will stay on the camera for a certain period of time (can be set, usually 2 seconds) to check the effect of the photo, allowing the photographer to quickly determine whether the photo meets the expectations, such as whether the composition is suitable, whether the desired picture is captured, etc.

** 3. Image quality related parameters **
1. ** Light sensitivity (USB)**
- You can set the minimum and maximum values. During daily shooting, the camera would automatically adjust according to the surrounding light when the sensitivity was set to AUTO. The higher the sensitivity, the more sensitive the camera was to light, but too high a value would increase the noise in the photo. The equipment itself had a maximum value that allowed it to produce the best image. If this value was exceeded, the noise in the photos would increase significantly.
2. ** High Iso noise reduction setting **
- In extremely dark environments, when there is no light, no tripod, and the exposure time cannot be extended, you can set the high Iso-noise reduction to adjust the brightness of the picture. However, this was not an ideal long-term solution. When the environment was not bright enough, it was best to use a light filling device.
3. ** Picture size, format, and quality (such as large size, medium size, small size, JPG, and RAW format)**
- Different photo size were suitable for different scenes. For travel photography, large size (L), high quality (Fine) JPG with RAW as the default storage format was better. RAW was used for archive and refinement, and JPG was used for batch processing and fast rendering. For scenes that required a large number of shots, such as news photography, medium size (M) and small size (S) were more useful. Small size could save storage space and shorten transmission time, but after shooting, it had to be adjusted back to large size, otherwise it would affect the quality of the next shot.

** 4. Lens-related parameters **
1. ** lens aberrations correction (peripheral brightness correction, distortion correction, digital lens optimization)**
- Turning on the peripheral light correction could reduce the dark corners of the photos taken, and turning on the distortion correction and digital lens optimization selection standards could improve the image quality and reduce the image distortion caused by the lens.
2. **OS ON/OFF (anti-shake switch, Canon says IS and other brands have different names)**
- The anti-shake function was used to compensate for the shaking of the hand-held camera. When the anti-shake function was turned on, the safety shutter could be increased by about 3 stops when shooting with a hand-held camera. For example, when shooting with a 200mm focal length, the anti-shake function could be turned on at a shutter speed of 1/60s to ensure that the photo would not be "blurred."

** 5. Other parameters **
1. ** Memory card not installed, release shutter **
- If it was set to not close, the shutter could be pressed without a memory card, but if it was set to close, the shutter could not be pressed without a memory card. When shooting important scenes such as events or weddings, be sure to set it to off to avoid mistakes of not installing a memory card to shoot the entire process.
2. ** Gridline Setting **
- When gridlines were turned on (such as 3x3 gridlines), a "jing" line would appear on the camera display, which could be used as a reference line for composition. It would help both novices and veterans in composition.
3. ** White Balance **
- It was important to set a custom white balance in a specific lighting environment (such as when taking a portrait in a room with pink or yellow lights). By setting the pure white photo you just took as the reference white, you can let the camera take photos of natural colors in the same environment. However, every time you set the custom white balance, you have to return to the default value (automatic white balance) after the shooting is completed because this setting is only applicable to the current environment and lighting conditions.
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