There are a few common reasons why night photos are grainy. A long exposure causes the camera sensor to overheat, causing the pixels to go rouge. You can minimize the amount of time your photo is exposed to improve the quality of the image. Another solution is to increase the ISO setting. In low light, higher ISO settings will produce cleaner images. This method is not always feasible, however. Try increasing the shutter speed to get a cleaner image.
Low light is another reason why night photos are grainy. Increasing ISO on your camera will let more light into the image sensor, but high ISOs are not always desirable. You can try using your camera’s auto-ISO feature, but you won’t always want to use it in complete darkness. If you don’t want to turn off the auto-ISO function on your camera, set the ISO manually.
In low light, longer exposure times can cause the sensor to overheat, resulting in extra grain in the photo. A low-ISO setting can also cause extra grain in the shadows. Slowing down the shutter speed is another solution, but it might make your photos blurry. Try using a tripod to keep your camera stable. Increasing ISO will also fix grainy images. A good camera can also be able to fix this problem.
High ISO can also cause grainy photos. If the subject is poorly illuminated, the ISO setting will need to be higher than normal. In low-light conditions, you can use a lower ISO setting. You can also use a flash to supplement the light. Ambient light will help reduce the amount of grain in your photos. Direct flash will only make your photos look harsh and produce red-eye. You should also make sure your camera can handle the high ISO setting.