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Buying a Used Canon? Check the Shutter Count First

The shutter count is the odometer of a camera. Here’s how to read it — and everything else to check before money changes hands.

The 5-minute inspection checklist

Read the shutter count over USB with EOS Digital Info (free, Windows) before buying. Ask the seller to do it in front of you — a refusal is a red flag.
Compare against Canon’s rating. Under half the rated actuations: great. Around the rating: normal, budget for eventual replacement ($200–$400). Well over: negotiate hard or walk away.
Listen to the shutter. It should sound crisp and consistent. Sluggish or uneven sounds mean wear the count alone won’t show.
Check the mirror box and sensor for scratches, oil spots and excessive dust. Shine a light in at an angle.
Test every button and dial, check the hot shoe, battery compartment (corrosion?) and card slots.
Shoot test frames at all ISOs and check for banding, dead pixels and AF accuracy.

Skip the gamble: buy graded used gear

Private sellers can reset file numbering and hide wear. Graded retailers inspect every body and offer returns:

Browse used Canon at KEH Browse used Canon at MPB Used Canon DSLRs on eBay

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Frequently asked questions

Can a seller fake or reset the shutter count?
The in-camera file numbering (IMG_0001) resets easily and proves nothing. The true actuation count lives in the camera’s internal memory and can’t be reset through any menu — always verify over USB, not from filenames.

What’s more important: shutter count or physical condition?
Both. A low-count body that’s been dropped is worse than a high-count body that’s been babied. The count is one data point in the full inspection above.

Should I avoid high-shutter-count cameras entirely?
Not necessarily — a 5D Mark III at 200,000 clicks with a fresh shutter replacement can be a bargain. Price should reflect remaining life, not just the number.