Hazy round spots sometimes appear in a recorded image especially when using the flash – Why does it happen?
Dust particles floating in the air may cause white round spots to appear on photographs taken with flash, especially if the camera used is very compact. The reason why very compact cameras are prone to this phenomenon may be due to several factors: • Due to their very small form factor, the flash is built close to the lens. The lens from the flash catches the dust and bounces it back into the lens. • Light sensors (CCD) in compact cameras are very small and are less sensitive to light and the flash level is high to compensate. • Compact cameras have a greater depth of field compared with other cameras with bigger lenses, due to their smaller focal distance. If the camera is set to wide angle, this may be even more visible. To prevent this issue from occuring as much as possible it is advisable to : • Switch off flash in environment where there are likely to be small dust particles or water droplets in the air. • Make sure the environment is enlighted enough or use an external source of
