What if there are black spots in the photos taken by SLR?

1, there are black spots in the photo, and there are two situations, one is the sensor bad spot, and the other is the sensor stain (dust);

2. Sensor defect detection method: cover the lens and manually focus to take a photo in all-black RAW format, and then press the zoom button on the LCD screen to maximize the viewing of the photo. The bad spots of the sensor are white spots or color spots in the picture, and no sensor stains can be seen in the black film;

3. The bad thing about the sensor is that the pixel is physically damaged and cannot be repaired. However, you can perform "pixel mapping" in the menu to mask bad points. If this function is not available in the menu, you can use software to screen the bad points after sale.

4, sensor stain detection method, use the minimum aperture of the lens to manually focus on the sky to take a photo (both JPG and RAW can be used), and then import it into the computer to use the image software to pull down the contrast in the software to the highest, or enlarge it on the camera LCD screen, and the black spots appearing in the photo are stains;

5. You can clean the sensor stains by yourself, and you need three tools (blowing, cleaning stick and cleaning liquid). After cleaning the stains on the sensor according to the menu prompts, the SLR takes off the lens and blows it with air to observe it again. If blowing fails, you can use a cleaning stick (cotton swab) or jelly stick. SLR with anti-shake body can only use cleaning stick, which can only be scanned once on one side, and a cleaning stick will be scrapped after being scanned once on both sides. Never sweep back and forth. When the cleaning rod is ineffective, use cleaning liquid, drop the cleaning liquid on the cleaning rod, and then sweep it with the cleaning rod. Using the cleaning stick can use a little force, but not brute force, which will not damage the sensor;

6. If you are not sure about cleaning the sensor, you can clean it after sale. You can clean it once for free during the warranty period, and you need to pay for it when it is used up or expired.