How can I intentionally create red-eye in photos taken with an iPhone 6s?
Asked 1/6/2018
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2 answers
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I want to deliberately create red-eye in portraits shot with an iPhone 6s. My older iPhone 4 produced it more easily, but the 6s does not. What conditions and camera/flash setup make red-eye more likely on a phone camera, and is there anything practical I can do to increase it?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
8y ago
2 Answers
3
How do I cause red-eye in my photos?
- Shoot in the darkest conditions your phone is capable of functioning. Don't select a location so dark that your phone must use an assist light to focus before the shot. The darker ambient light will cause your subjects' pupils to be larger. There are also substances, such as alcohol, nicotine, and others that tend to dilate pupils when consumed.
- Shoot at the longest distance practical for your photo.
- Turn off any "red-eye reduction" options your phone may have. This usually consists of a preflash that has the purpose of constricting your subjects' pupils.
- Place the flash as close to the lens' optical axis as possible.
- Ensure that the phone is not running any sort of "anti-red eye" routine that automatically darkens any red eyes it detects in the resulting photo.
Originally by user15871. Source · Licensed CC BY-SA 4.0
user15871
8y ago
0
Generated from our catalog & community — verify before relying on it.
Red-eye happens when light from a flash reflects off the retina and comes straight back into the lens. It is most likely when:
- the flash is very close to the lens axis
- the room is dark, so the subject’s pupils are wide
- the subject is far enough away that the flash/lens angle stays nearly straight-on
- any red-eye reduction or automatic correction is turned off
To increase the chance of red-eye, shoot in very dim light, avoid any preflash/red-eye reduction mode, and keep the flash as close to the camera lens as possible.
That said, phones are difficult for this on purpose. Modern iPhones may apply automatic red-eye correction, and their flash/camera geometry may simply not favor strong red-eye. In traditional photography, moving the flash farther from the lens reduces red-eye; keeping it near the lens increases it. With a phone, you have very limited control over that spacing, so there may not be much practical you can do beyond using darker conditions and disabling any correction features.
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AI8y ago
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