The old watermark camera can't be used, and the photos can't be saved. That soldier will take care of it. Thank you.

Tighten the cover when using the camera. It can not only prevent the camera from being eaten up, enhance the novice's self-confidence, but also effectively ensure the lens safety when your camera bumps (unless you hold it like a baby, no one can guarantee that his camera will not bump. ) 2. Equipping the lens with a UV mirror can not only filter ultraviolet rays, but also prevent the surface of the lens from being contaminated. If the lens surface is directly dirty, your cleaning behavior will inevitably damage the coating on the lens surface. In contrast, everyone would rather wear a UV mirror. ) 3. Be sure to take out the battery when not in use to prevent unnecessary power loss of the battery. 4. Try to cover the lens cover when not in use, even when shooting. 5. Don't often unscrew the lens from the fuselage. It will be very troublesome if dust falls into the fuselage. 6. Try to change the lens in a dusty room. You can't change the lens just after sweeping the floor or just folding the quilt. 7. Buying a good quality lens pen and hair dryer will help you clean the lens surface better. You don't need to use any organic reagent to clean the lens surface, which will damage your coating. 8. Keep the camera away from high temperature or humidity and try to keep the camera dry. 9. If you need to shoot in rain and snow, please be prepared for waterproof, such as taking an umbrella. D5000 is not a high-end model, so its waterproof performance is not excellent. 10 Try not to shoot in desert and other areas. Even a top model, a trip to the desert will make your camera go up in smoke. 1 1 handle the camera gently, don't carry it with your hands, and get into the good habit of hanging it around your neck. 12. In winter, entering the room from the outside will cover your glasses with water vapor. Low temperature will condense water vapor into water droplets. By the same token, if you bring your camera into a warm room from the outside, it may cause the water vapor inside your camera to condense. You can try this method. Put the camera in a plastic bag, tie it tightly, then enter the room and take it out when the camera temperature rises. Of course, a good quality camera bag is a good idea.