Preflash To Reduce "Red-Eye - Rollei Prego 90 AF Gebrauchsanleitung

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Preflash to reduce "red eye"
In this mode, the flash fires twice: The main flash is
preceded by a preflash designed to make your subject's
pupils contract, thus reducing the risk of "red eye" in your
pictures.
Camera and subject should not move until the second
(main) flash has fired.
(Examples 16 and 17)
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Note
• "Red eye" occurs if a subject's pupils are wide open.
The flash then illuminates the retina which shows up
red in your pictures. In indoor photography, try to turn
on all room lights so your subject's pupils will contract.
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