Troubleshooting AutoFocus: Fix Blurry Photos with These Quick Fixes
1. Confirm focus mode
- Single (AF-S/OneShot): Use for stationary subjects.
- Continuous (AF-C/AI Servo): Use for moving subjects.
- Auto: Often unreliable—pick manual mode when needed.
2. Check AF point selection
- Use a single central AF point for most accurate focus, especially in low contrast.
- Switch to zone or tracking for erratic or moving subjects.
3. Increase shutter speed
- Rule of thumb: shutter speed ≥ 1/(focal length) for handheld shots (use 1/(2× focal length) for safety with movement). Increase further for moving subjects.
4. Open aperture or raise ISO
- Wider aperture (lower f-number) helps AF and creates faster shutter options.
- Raise ISO if needed to maintain shutter speed; prefer lowest acceptable noise.
5. Improve contrast and lighting
- Autofocus works poorly on low-contrast or low-light scenes—add light, use focus assist, or switch to manual focus.
6. Clean lens and contacts
- Wipe lens elements and ensure lens-to-body electronic contacts are clean and securely mounted.
7. Disable image stabilization when using tripod
- IS/VR can cause blur on a tripod—turn it off when camera is stable.
8. Use back-button focus
- Separates focusing from shutter release to lock focus precisely and recompose without refocusing.
9. Microadjust autofocus (AF fine-tune)
- If front/back focus persists, use your camera’s AF microadjust or lens-specific calibration tools to correct focus errors.
10. Test with live view or manual focus for confirmation
- Use Live View magnification to verify focus. If consistent misses occur in phase-detect AF, fall back to contrast-detect (Live View) or manual focus.
Quick checklist to run now:
- Set correct AF mode and single central AF point.
- Increase shutter speed and/or ISO.
- Add light or use flash.
- Clean lens and contacts.
- Test in Live View and consider AF microadjust.
If you tell me your camera and lens model I can give model-specific steps.
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