Buying a Used Camera: What to Check

A used camera is usually the best value in photography, because cameras depreciate fast and wear slowly. A body two or three generations old typically costs half its launch price and takes photographs that are, in any normal use, indistinguishable from the current model's. The risk is real but small, and it is almost entirely manageable with a checklist.

Start with why this works. Camera manufacturers release new bodies on a cycle, and each release pushes the previous generation down in price far faster than it declines in capability. Sensor image quality in particular has improved slowly for years — the meaningful advances have been in autofocus, video specification and stabilization, not in how a daylight photograph looks. So a used body from a few years ago gives up features rather than picture quality, and features you may not use.

Lenses depreciate even more slowly and wear even less. A prime lens with no moving zoom mechanism, kept in a bag, is essentially the same optic at ten years old as it was new. This is why experienced photographers often buy bodies new and lenses used, or buy both used and put the savings into better glass.

The checklist: what to actually inspect

1. Shutter count — and why it matters less than you think

Every mechanical shutter has a rated life, often somewhere between 100,000 and 200,000 actuations for an enthusiast body. Sellers should be able to tell you the count, and free tools can read it from a recent photograph's metadata for most brands. Treat it as you would mileage on a car: informative, not decisive. A body at 20,000 has barely started. One at 150,000 is near the end of its rated shutter life, and a shutter replacement costs real money.

One modern nuance: many mirrorless cameras can shoot with an electronic shutter, which has no moving parts at all, so a high-count body may still have years in it if the owner shot mostly electronically. Ask.

2. The sensor

Ask the seller for a photograph of a plain bright surface — a white wall or clear sky — taken at a narrow aperture like f/16, which is where sensor dust shows most clearly. A few dust spots are normal and cleanable. What you are looking for is anything that is not dust: scratches on the sensor's protective filter, oil splatter from a worn shutter mechanism, or a dead pixel cluster showing as a colored dot in the same place in every frame. Dust is a chore; a scratched filter stack is expensive. Our cleaning guide covers what is user-fixable.

3. The lens elements and the aperture blades

Hold the lens up to a light and look through it. Dust inside a lens is extremely common and almost never affects images — do not let a seller discount for it and do not panic about it. What matters is fungus, which looks like fine white branching threads and spreads, permanently etching coatings; haze, a milky film that lowers contrast; and separation, an oily rainbow patch where cemented elements have come apart. All three are effectively fatal at used-lens prices. Then work the aperture: it should snap crisply, with no visible oil on the blades.

4. The mount, contacts and screen

Look at the lens mount on both body and lens. Heavy brassing on the metal is honest wear. Bent flanges, stripped screws or misaligned contacts are not. Check the electrical contacts are clean and unpitted. Then check the screen for dead pixels and delamination, the viewfinder for dust and dead pixels, and every rubber grip for lifting — perished rubber is cosmetic but it tells you how the camera was stored.

5. Work every control

If you can handle the camera, spend five minutes pressing everything. Every button, every dial through its full rotation, the mode dial into each position, the card door, the battery latch, the ports. Mount and dismount a lens. Take a photograph at several apertures and shutter speeds and look at them. A control that sticks is a repair; a control that does nothing is a mainboard.

6. Water damage and the honest questions

Corrosion around the battery compartment, a gritty feel to the dials, or a faint smell of damp are the tells. Ask three questions directly: has it ever been dropped, has it ever been wet, and has it ever been repaired? An honest seller answers plainly. Hesitation on any of them is worth more than any spec.

Where to buy, and what protection you get

Specialist used dealers— camera shops with a second-hand department, or the large online used retailers — grade their stock, test it and offer a warranty of typically six to twelve months. You pay perhaps 15 to 25 percent more than a private sale for that. For a first used purchase, we think that premium is worth it: you are buying somebody else's inspection and a route to a refund.

Private sales — marketplaces and forums — are cheapest and carry all the risk. Meet in person if you can, take a memory card and a laptop, and run the checklist above before money changes hands. If you must buy remotely, use a payment method with buyer protection and never one without.

Manufacturer-refurbished stock sits in between: returned or ex-display units, checked and warrantied by the maker, often at a genuine discount to new. It is the safest non-new option and the stock is unpredictable.

What a fair price looks like

Search the exact model on a large marketplace and look at completed sales rather than asking prices — what people actually paid, not what sellers hope for. As a rough anchor, expect a body in good condition two or three generations old to sit around half its launch price, and a well-kept prime lens to hold considerably more of its value than that. Then decide what the risk discount is worth: if a private sale is only slightly cheaper than a warrantied dealer unit, take the warranty.