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See what you’ll get
SAMPLE REPORT
123
3 suspected dust spots
Review the marked areas and compare another test photo.
Example only. Your results may differ.
What happens next
1
Take test photos
Use the right setup for your test and follow our photo guide.
2
Review marked areas
We’ll highlight suspected dust or bright pixels so you can check them yourself.
3
Follow the next steps
Compare another test photo and decide what to look at next.
A BETTER TEST STARTS HERE
Good photos. More useful results.
A few simple settings help separate possible sensor issues from the scene.
01 / WHITE-FIELD TEST
Check for sensor dust
Choose an evenly lit, texture-free white wall or sheet of paper. Avoid shadows and direct sunlight.
Use your camera’s base ISO (usually 100–200), f/16–f/22, and manual focus. Deliberately defocus the image.
Fill the frame with the white surface. Make it bright, but avoid clipping the highlights.
Take 3 separate photos, changing the direction you point the camera between shots.
Use uncropped photos of the same size. Export RAW files to full-size JPG or PNG first.
Suspected dust does not mean sensor damage. Follow your camera manual for cleaning, or ask a qualified technician.
02 / DARK-FRAME TEST
Check for bright pixels
Fit an opaque lens cap. Use manual exposure and focus, with Auto ISO off.
Start at ISO 100–200 and about 1/125 second. Take 3 separate photos using the same settings.
If your camera allows it, turn off long-exposure and high-ISO noise reduction for the test. Restore your usual settings afterward.
For long exposures, take a separate set at 1–5 seconds. Do not mix it with the short-exposure set.
Use full-size files without added sharpening or noise reduction.
Exposure, temperature, and image processing affect bright pixels. Repeated bright spots do not by themselves prove physical sensor damage.
A few common questions
Why use 3 separate photos?
Multiple independent photos help check whether a spot repeats in the same image position. Duplicate, resized, or differently cropped files cannot provide reliable confirmation.
Can I use RAW files or social media images?
Export RAW files at their original size to JPG or PNG. Avoid screenshots and images compressed by social platforms: processing can hide small spots or introduce artifacts.
Does this check shutter life or overall camera health?
No. Test photos cannot reliably establish remaining shutter life, battery health, water damage, or repair history. A shutter count checker is planned but is not available yet.
EVIDENCE BEFORE A SCORE
See the details. Know the limits.
Photo screening is a starting point, not a full camera inspection.
What we look for
Sensor dust
We compare local brightness in a white-field photo and mark areas darker than their surroundings. Photos are scaled to a maximum of 1,600 pixels on the longest edge for this test.
Texture, shadows, lens debris, vignetting, and exposure affect results. Small or faint spots may be missed.
Bright pixels
We look for isolated bright areas in decoded, full-size dark-frame images, then compare their positions across separate photos.
Compression, noise reduction, and in-camera processing affect what is visible. Image coordinates do not precisely identify physical sensor sites.
This rule-based screening has not been validated against a large labeled set of real camera photos. We do not promise an accuracy rate or give an overall health score.
Your photos stay with you
Photos and EXIF data are processed in this browser. This website’s code does not upload them to a server. Refreshing or closing the page clears the selected photos.
Your local history
This browser can store up to 30 report summaries: date, camera name, test type, and result. Original photos, GPS information, and EXIF serial numbers are not stored.
Camera Health Lab
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