Why in Olympus digital camera shakes while clicking without flash?

Answer 1

This is something that can happen with any camera and is not specific just to Olympus.

To understand the relationship between camera shake when using a camera with or without flash, you first need to understand the basics of shutter speed, camera metering and flash.

The shutter speed in how fast your camera closes the shutter when snapping a picture. Fast shutter speeds of 1/160th of a second and higher are usually required for freezing action. Even at 1/160th, you may get some blurry images depending on what is being photographed. Also, a faster shutter speed allows less light in through the lens and slower more light. This speed needs to be adjusted to capture the proper balance of light for the photograph called Exposure.

Most people that use a point and shoot camera are using the automatic modes, such as P(Program). In these modes, the camera is using it's internal meter to control how fast the shutter needs to be for a proper exposure. In a low light situation, the shutter will be slow. Since the shutter is open longer, this will cause camera shake due to the small variations and shakes you are making with your hands. It may not be noticeable to you, but it is to your camera's sensor.

So why does it go away when using flash? The answer is simple. Flash happens a fractions of a second... much faster than your camera's shutter. This instant light pulse reaches your subject before the ambient light has time to register on your camera's sensor. Since this light information is seen immediately a so briefly, it freezes your subject in place. Even with a longer exposure, the illuminated subject should stay frozen while ambient light fills the rest of the frame.

A trick you can try is setting your camera to a manual exposure and set the shutter speed to 2 or 3 seconds. Take a flash photo of someone, but move the camera around after the flash. Your subject should be relatively frozen while the rest of the frame is blurry or shaky.