Why Does Underwater Camera Be Unclear?

The  photos or TV images of underwater camera are unclear and are the most common. And they are also effect the image quality. The scattering of water to reduce the sharpness of the image is talked in last passage. Today let's talk about reasons and solutions based on underwater camera with unclear image.

The underwater camera shake caused the image clarity to decrease

● Due to the effects of water buoyancy, water flow and swells, it is often difficult for divers to hold the camera when taking pictures underwater, resulting in blurred images of underwater shooting.

●  To solve this problem, we must first improve the diver's diving skills and ensure that the stability of the diver can be controlled in a more complex underwater environment. In addition, the following methods can be considered to solve.

●  An auxiliary work platform is used as a support for underwater shooting. Under underwater shooting, especially in the case of large water flow and complicated sea conditions, a working platform is provided for the working diver as a basis for stabilizing the body and the camera. It is very effective for preventing image blur caused by camera shake.

●  The diver can choose the appropriate shooting position. Depending on the subject and position, the diver should choose the shooting position. When shooting underwater, if the water flow is not large, you can choose to shoot with both legs or one-legged posture, and the stability is better. If the water flow is large, you can choose to take a prone position.

● When shooting at the bottom of the water, wear more heavy objects. When shooting underwater, in order to increase the stability of the diver, you can wear more lead, usually no less than 10 kg, if you wear a diving suit should be no less than 15 kg.

The un-accurate focus results in reduced image clarity

● When shooting underwater, it is necessary to accurately focus on the subject as the shooting distance changes, and the focus is not accurate or the focus is not adjusted, which will cause blurring of the image.

● At present, the commonly used diver underwater TV system, the focus of its underwater camera is mostly controlled by the water surface console. During underwater shooting, the operator of the water surface console must pay attention to the image on the monitor. When the underwater camera moves position, the operator must first quickly determine whether the shooting distance is getting closer or farther, and then according to the distance. The focus switch is manipulated in a timely and rapid manner for tracking focus.

● When divers operate the camera underwater, pay attention to the cooperation with the water surface. Try to maintain a relatively stable shooting distance. Do not let the console operator keep track of the focus.

● When shooting underwater, the diver should also ensure that the minimum shooting distance cannot be less than the closest focus distance of the lens.

The exposure is seriously insufficient or excessive to result in unrecognizable images

● Underwater photography usually requires auxiliary light illumination to provide sufficient illumination for the shot. Underwater photography uses underwater illumination, but if the auxiliary illumination is not used correctly during shooting, the illumination of the light source is seriously insufficient or too strong, which may make the captured image dim or bright spots and the subject cannot be recognized.

● The brightness of the underwater camera is generally adjustable. Underwater imaging should be adjusted to the appropriate brightness according to the image of the monitor and the reflection intensity of the surface of the scene. When shooting at close range, adjust the illumination direction of the illumination to avoid strong reflection on the surface of the scene and leave a bright spot on the image.

In addition to the above reasons, there are other factors that affect the sharpness of the image, such as ropes, air bubbles, seaweed and other objects between the lens and the scene. If the image is not cleared in time, the image is partially blocked; the shutter speed is selected too slowly when shooting the moving body

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