Turn an unusable image into a diagnosis
Before you begin: Photography foundations: sharpness decisions. Keep the original file and its settings.
A failure record should separate evidence, candidate causes and the next test. 'Blurry' is an observation category, not a diagnosis. Look at stationary detail, moving detail, the plane of best focus and any directionality in the blur.
Change one variable in a repeatable scene. If the whole frame has similarly directed streaks, camera movement is a candidate. If stationary objects are sharp while the moving subject streaks, subject motion is a better candidate. If another distance is sharp, examine focus placement.
Worked example & observations
Synthetic case: a street sign is crisp, a walking person is smeared, and the exposure is 1/15 second. Start by testing a shorter exposure while maintaining similar brightness. Do not start by cleaning the sensor or buying a lens: neither addresses the evidence. Save both frames and write whether the person’s outline improved.
Your turn
Your close subject is soft but a chair behind it is sharp. Give a likely cause and a test that distinguishes it from camera shake.
Show answer and reasoning
Focus may have landed behind the subject. Focus deliberately on the subject, support the camera and repeat. Improvement at the intended distance supports a focus-placement explanation. It is not proof unless the comparison controls movement and settings.
Watch for: A single compressed preview may hide the relevant detail. Inspect the original at a comparable viewing size, and retain uncertainty when several causes fit.
Published and planned
Published: this starter lesson, worked example and exercise with an answer.
Planned: Owner-submitted failure photographs with annotated evidence and confirmed repairs.
Validation: source review and mathematical checks where applicable. Photography captures, audio listening and device workflows have not been performed for these lessons. Synthetic cases are labelled; no personal media or field observations are implied.
References
Original AUWEN teaching and examples. Sources reviewed 14 September 2026.
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