About Red-eye Phenomenon

Shooting portraits with a flash in a dark environment often results in eyes looking reddish in the photograph. This phenomenon, commonly known as “Red-Eye”, is caused by the reflection of the electronic flash in the retina of the eye. It can be reduced by taking a picture in brighter light or by shooting with a wider-angle lens at a closer distance. When using an external flash, it may also help to position the flash as far away from the camera as possible.

Flash photography distance

As a rule of thumb, the distance for using the built-in flash (which varies with the lens used) is within about four meters of the subject. (With sensitivity 400)

• The flash effective range does not come closer than 0.7m (2.6ft), even if the lens aperture is very small. The exposure will not be properly controlled when taking a picture closer than 0.7m. Note that this can also cause and you will see vignetting in the picture corners.

•To calculate the flash photography distance from the aperture size, see p.139.

Flash Recommended indicator

The flash recommended indicator [b] in the viewfinder and on the LCD panel will blink to recommend that you use the flash when you attempt to take a picture in low light and backlight condition.

• bwill blink only in backlit conditions when the capture mode is set to b (shutter priority) mode or a(manual exposure) mode.

•bstops blinking when the flash is fully charged.

•bwill not appear in Bulb mode.

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