01

Quick diagnosis

Choose the closest visible symptom.

Use the diagnostic above before changing several settings at once. A useful test isolates one variable, repeats the frame, and compares the focused plane at the same output size.

02

Cause 1 — camera shake

The frame shares a directional smear.

Signal: stationary edges duplicate or streak in a similar direction. 30-second test: place the camera on a stable surface and use a timer. Fix: increase shutter speed, improve support, or use stabilization appropriately. Prevention: set a realistic Auto ISO minimum shutter speed.

03

Cause 2 — subject motion

The scene is sharp but the subject moves through the exposure.

Signal: background detail survives while hands, feet, hair, or wheels stretch. 30-second test: repeat at successively faster shutter speeds. Fix: increase shutter speed and compensate with aperture or ISO. Prevention: decide the motion threshold before the action begins.

04

Cause 3 — missed focus

Sharp detail exists on the wrong plane.

Signal: an ear is sharp but the eye is not, or the background is clearer than the subject. 30-second test: select one AF point on a stationary high-contrast detail. Fix: choose the correct focus point and AF mode. Prevention: verify what the camera selected instead of trusting the green confirmation alone.

05

Cause 4 — optical or processing softness

The supported, focused frame still lacks fine detail.

Signal: detail looks smeared rather than directionally blurred. 30-second test: compare RAW files at several apertures on a tripod. Fix: avoid the weakest aperture, remove suspect filters, reduce excessive noise reduction, and sharpen for output. Prevention: test the actual lens/camera pipeline.

06

If nothing works: isolate the system

Build one boring frame that removes uncertainty.

  1. Use a detailed stationary subject in good light.
  2. Mount or brace the camera and use a timer.
  3. Select one focus point and record RAW.
  4. Shoot at f/5.6 or f/8 with a fast shutter.
  5. Compare the focused plane. If repeatable asymmetry or consistent front/back focus remains, consult the camera/lens service guidance.

TOOL / 02Symptom finder

What does the blur look like?

Choose the visible evidence. The tool narrows the likely cause and gives you one test to run next.

Is anything in the frame sharp?
What shape does the blur have?

QUESTIONS THIS ANSWERS

Questions this answers

  • Why are my photos blurry even when focus looks correct?
  • Is the blur camera shake, subject motion, or missed focus?

Found something wrong? Report an error or read the corrections policy.

3 SOURCESEvidence ledger

Sources

  1. 01
    Understanding Shutter Speed ↗

    Nikon USA · accessed 31 Aug 2026

  2. 02
    Understanding Maximum Aperture ↗

    Nikon USA · accessed 31 Aug 2026

  3. 03
    Understanding Auto ISO ↗

    Nikon USA · accessed 31 Aug 2026