Use the test target
Print or display the supplied target. We guide distance, alignment, light and camera settings for your exact test.
Optical testing, made useful
Know what your lens is really doing.
A repeatable test for camera and lens performance. Shoot the target, upload the images, and get clear evidence of sharpness, focus consistency and autofocus behaviour.
✓ No special hardware✓ RAW & JPEG✓ Repeatable real-world testing
AF consistencyVery good
Best correction−6 AFMA
EF 85mm f/1.8
Canon EOS 6D · f/1.8
HEALTHYCanon EOS 6D · f/1.8
5-frame AF runCompared with Live View
89score
Centre sharpness94
Focus repeatability87
Frame consistency91
3 stepsfrom camera to result
AF + LVseparate focus from optics
Repeatablecompare before and after
Evidencenot “looks sharp to me”
Simple by design
A proper test without turning your kitchen into an optics lab.
We control the important variables, keep the shooting process practical, then do the tedious analysis for you.
Take the sequence
Capture a short controlled run: autofocus, live view and — where useful — AF adjustment steps. No random hundred-shot faff.
Upload. Measure. Know.
We analyse the images as a set, looking for sharpness, repeatability, focus bias and the difference between AF and optical performance.
Results you can act on
Less pixel peeping. More evidence.
A good result should answer the question you actually have: is the lens healthy, is focus consistent, and is there anything worth changing?
Sharpness across the frame
See where performance is strong, where it falls away, and whether one side behaves differently.
Autofocus consistency
One sharp frame proves very little. We care about the spread.
AF vs Live View
If Live View is strong but viewfinder AF isn't, that's useful. If both are weak, that's a different problem.
LIVE VIEW
VIEWFINDER AF
Clear recommendation
No twenty-page optical thesis unless you want one.
Lens performance: healthy
AF shows a repeatable rear-focus bias. Recommended AFMA range: −4 to −7. Re-test after adjustment.
Why TestMyLens?
Because “it seems a bit soft” isn't a diagnosis.
Modern cameras are good enough that faults, setup and calibration can all look annoyingly similar. The point is to separate them.
Buying used?
Check a lens while you still have options, rather than finding out three months later at 200% zoom.
Something changed?
Compare against a previous baseline after a knock, service, body change or simply when results stop feeling right.
Chasing autofocus?
Measure repeatability first. Calibration is pointless if the underlying focus behaviour isn't consistent.
Ready to stop guessing?
Choose your camera and lens, follow the guided test, then upload the sequence for analysis.
Start a new test →Questions
Before you point a camera at a chart.
Do I need a special target?
No. The test workflow supplies the correct target and tells you whether to print it or display it on screen for that test.
Does this work with mirrorless cameras?
Yes, although the diagnostic questions differ. Traditional AF microadjustment is mainly relevant to DSLR phase-detect systems; mirrorless testing focuses more on optical performance and repeatability.
Why do you ask for multiple images?
Because a single image can be lucky or unlucky. A sequence lets us distinguish peak sharpness from focus consistency — often the more useful thing to know.
Can I compare two lenses?
Yes. Repeat the same controlled test and compare the distributions rather than relying on two cherry-picked frames.