The optimal focal length for portraits is 80–135 mm, as it harmoniously captures facial features and blurs the background. Important factors include an unobtrusive background, shooting at the subject’s eye level, and soft, diffuse lighting. When photographing children, shooting at knee level and using short exposure times is recommended. Changing perspective can eliminate distracting backgrounds.
Category: Photography Basics > 4. Image Composition & Design Article ID: 4.13 Created: May 2026
Key Points in Brief
- The optimal focal length for portraits is 80–135 mm – wide-angle distorts facial features, telephoto flattens them
- The background should be unobtrusive and blurred – immediately remove distracting elements (e.g., trees appearing to grow out of the head) by changing perspective
- Shoot from the eye level of the subject – especially important for children
Explanation
Focal Length: The Most Important Technical Element
| Focal Length | Effect | Use |
|---|---|---|
| < 35 mm (Wide-angle) | Distorts facial features – nose, chin, and ears appear disproportionately large | Only for environmental portraits (subject + context) |
| 50 mm (Normal) | Natural, but slight distortion still noticeable | Everyday shots, documentary style |
| 80–135 mm | Flattens facial features, soft proportions | Ideal for classic portraits |
| > 135 mm | Very flat, compressing effect | Candid shots, street photography |
Why 85–135 mm?
- The longer focal length allows more distance from the subject → they behave more naturally
- Less depth of field → background automatically blurs
- Facial features appear more harmonious than with shorter focal lengths
Shaping the Background
The background can make or break a portrait.
Good background:
- Monotonous, uniform color, unstructured
- Blurred due to shallow depth of field (wide aperture + telephoto lens)
- Subject 1–2 meters away from the wall → no harsh shadows on the background
Poor background:
- Many details and textures competing with the subject
- Objects protruding from the head or body (trees, poles, church spires)
- Same color as the subject → subject blends into the background
Solution: Often a small change in perspective (a step to the side, slightly lower) is enough to remove a distracting background element.
When the background may remain visible: For environmental portraits (subject in their work or living environment), the background is important for the image’s message – e.g., a craftsman at a workbench, a child playing.
Perspective and Eye Level
- Eye level of the photographed person is almost always the best choice – natural, respectful, at eye level
- Worm’s-eye view (from below): Subject appears imposing, powerful, strong – but also arrogant
- Bird’s-eye view (from above): Subject appears small, humble, vulnerable
- For children: Definitely shoot at knee level or lower – from adult height you look down on them, making them appear smaller and less significant
Lighting
- Soft, diffuse light (cloudy sky, shade) → ideal for portraits, flattering, no harsh shadows
- Direct sunlight → harsh shadows under nose and chin → unfavorable; recommended to move into shade
- Indirect flash (bouncing off ceiling or wall) → soft, natural light, no red-eye effect
- Reflectors (white cardboard, white sheet, aluminum foil) → create soft additional light from any direction, cost-effective
Light stripes as an effect: Photograph the subject through a grid or blinds – resulting light and shadow stripes can create very interesting, artistic portraits.
Group Photos
- Take multiple shots – at least one person usually has their eyes closed or looks away
- Small groups: arrange loosely and naturally, not too rigid
- Large groups: taller in back, shorter in front; front row can kneel/sit for a more natural layering
- Focus on the sharpest person: focus on the eyes of the main subject
Child Photography – Special Considerations
- Photograph at the child’s eye level (kneeling, sitting, lying down)
- Photograph children in everyday situations rather than staging → more natural, character-rich images
- Use short exposure times (children move quickly) → camera’s “children” program or S/Tv mode with 1/250 sec or faster
- From a distance and unnoticed: more authentic than directly in front of the camera
Practical Tip
The most common portrait mistake: camera in landscape orientation and shooting from standing height. Solution: Rotate the camera to portrait orientation and get down on your knees (for children) or get to the subject’s eye level. At the same time: open the aperture to f/2.8 or f/4 and use a focal length of 85–135 mm. That’s enough for a noticeably more professional result – without studio equipment.