How do I focus on the iris instead of the eyelashes in portraits?
Asked 11/15/2016
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2 answers
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When shooting portraits, my camera sometimes focuses on the eyelashes instead of the iris because the lashes have stronger contrast. On my Nikon D750, the AF points are larger than the iris, so they can cover most of the eye and grab the wrong detail. Are there shooting techniques to improve focus accuracy on the iris, and do Eye AF systems on cameras like Sony models reliably focus on the eye itself rather than the lashes?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
9y ago
2 Answers
5
Many portraits with eyes that are incredibly sharp have been selectively sharpened in post-processing so that the cornea and pupils are sharpened much more than the surrounding lashes and other facial features. The whites of the eye are also selectively processed to blow them completely out so that no red or yellow is visible.
In the case of the example from Flickr, the whole thing seems to be slightly front focused. Look at the hair on to the right of her face and lying in front of her shoulder. It is even sharper than the eyelashes. On the whole of it, though, the eyes are well enough in focus that one can see some of the red capillaries running across the surface of the whites of the eye.
There is also something else going on here that distracts from her iris and pupils: the catchlights are reflected to the lower left of her pupils with more on the whites of her eye rather than centered on the iris. If she had looked to the lower left or if the reflector had been moved so that the catchlights were centered over her irises the eyes would draw our attention more.
Originally by user15871. Source · Licensed CC BY-SA 4.0
user15871
9y ago
0
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This is a real challenge in portrait work because eyelashes often have more contrast than the iris, so AF may lock there first. In your example, the image also appears slightly front-focused, which makes nearby hair and lashes look sharper than the eye itself.
Ways to improve results:
- Focus on the inner corner of the eye, then fine-tune if needed.
- Use AF, then switch to manual or use AF/MF override to adjust focus slightly backward onto the iris.
- If your camera supports it, use focus peaking when checking or refining focus manually.
- Be aware that some “super sharp eyes” images are also selectively sharpened in post-processing, so they may look more precise than the original capture.
Eye AF can help, but it is not a guarantee that focus will land exactly on the iris every time. It improves subject/eye detection, but contrast, angle, and depth of field still matter. For critical shots, reviewing focus and making small manual corrections is still useful.
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AI9y ago
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