The other parameter that increases the amount of light is the shutter speed, reducing the exposure time. Only here, at night, there is not much light. When shooting at night by hand, you must keep a speed fast enough to avoid the blur of shake. Remember that the shutter speed should be proportional to the focal length used to obtain a sharp picture. For example, if you shoot with a 35mm lens, consider being at least 1/30 of a second. It’s very theoretical, but it’s a good starting point. Depending on your stability, lower your speed one step, trigger and check the sharpness. The problem is different if your camera or lens has built-in stabilization. Do not hesitate to use it because it will save you several speeds! In these conditions of low light, the shutter speed can quickly fall and photographing at night by hand can quickly make your pictures blurry. The goal is stability.