Start with the workload, not the spec sheet
The biggest buying mistake is shopping by raw numbers before deciding what the camera has to do. Sort yourself into one of four buckets. Travel and everyday means street, family, and vacation photos where size and grab-and-go convenience beat outright image quality; a compact body with one versatile zoom, or honestly your phone, covers most of it. Portrait and content means flattering people shots, vlogs, and product photos, where the lens lineup and reliable eye autofocus matter far more than megapixels. Action and wildlife means sports, birds, and kids who never sit still; you need fast continuous autofocus, a deep buffer, and a long telephoto with reach. Pro and landscape means large prints, paid client work, and dynamic range you can push hard in editing, where a bigger sensor and weather sealing earn their keep. Each bucket points to a different shortlist, and getting this right matters more than any single number on the box. If you straddle two buckets, build around the more demanding one; you can shoot easy subjects with a serious kit, but not the reverse.
Phone versus mirrorless, and which sensor
Be honest about whether you need a camera at all. A modern phone wins for casual snaps and instant sharing, and its computational tricks flatter faces and skies in ways an entry camera does not. Buy a dedicated camera when you want shallow background blur, real zoom reach, fast tracking of moving subjects, or raw files you can push three or four stops in editing. Once you cross that line, choose mirrorless, not a DSLR; every manufacturer has frozen DSLR lens development, so a new DSLR mount is a dead end.
Then pick a sensor size. APS-C is the sensible default: smaller, lighter, cheaper bodies and lenses, with image quality that satisfies the vast majority of shooters. Full-frame buys you roughly a stop of low-light advantage, easier shallow depth of field, and more cropping room, at a real cost in price, size, and lens weight. The overspend trap here is brutal: people buy a full-frame body for the prestige, pair it with one slow kit zoom, and shoot in daylight, getting results an APS-C kit would have matched for half the money and weight. A full-frame body wearing a dark kit zoom is a status symbol, not a better camera.
The lens ecosystem outruns the body
This is the rule that separates people who enjoy their gear from people who churn through it: the lens system matters more than the body. Bodies depreciate and get replaced every few years; good lenses outlast three or four of them and hold their value. Before committing to a mount, look at the whole lens roadmap, not the one lens you need today. Does the system have an affordable fast prime, a sharp telephoto, and a stabilized standard zoom at prices you would actually pay? Sony E, Canon RF, and Nikon Z each have deep lineups; smaller or newer mounts often have a gap exactly where you'll want a lens in two years, forcing a pricey native option or a clumsy adapter.
For most buyers, one or two good lenses beat a bag of mediocre ones. A bright 35mm or 50mm equivalent prime teaches you more and shoots better in dim rooms than any slow superzoom. Used lenses are excellent value because optics rarely fail; hold one up to a bright light to check for haze and fungus, sweep the focus ring for grit, and you can buy glass that's a decade old with confidence.
Reading the specs that matter
Autofocus is the spec that has transformed most in recent years. Subject-detection AF that locks onto human eyes, animals, and vehicles is worth real money if you shoot people, pets, or action; bodies older than about 2021 are noticeably worse at it, so this is where buying current pays off. Megapixels matter less than you think: 24MP prints to poster size and crops generously, and chasing 45MP-plus mostly fills cards and slows your editing unless you crop hard or print billboards. In-body stabilization (IBIS) buys you sharp handheld frames at slow shutter speeds and steadier handheld video, and it's a strong reason to favor a newer body. Burst rate only matters for action; 8 to 10 frames per second covers most of it, and only stacked-sensor flagships meaningfully exceed that. For video, check the 4K frame rates, the per-clip recording limit, and whether 4K comes with a crop; vloggers should confirm a fully articulating screen and a microphone jack before anything else.
When to buy: seasonal timing
Camera prices follow a rhythm you can exploit, because the industry's calendar is unusually predictable. New bodies and lenses cluster around CP+ in late February (the big Yokohama trade show) and a second wave each autumn before the holidays. A body launches at full price and drifts down over the next 12 to 18 months; cameras have far longer model cycles than phones, so a two-year-old body is rarely outdated and frequently sells for 20 to 30 percent below launch. The deepest cuts land in the late-November sales window and again in late-winter clearance, when retailers dump inventory ahead of new CP+ announcements. You can see this in our price histories: most bodies dip hardest in November and again in the weeks before spring launches.
Lenses run on a separate clock worth tracking. Manufacturers schedule cashback and instant-rebate promotions, usually around the holidays and again in late spring, that knock a real chunk off a lens with no change to the sticker price. If you want a specific lens, set a price alert and wait for the next rebate window rather than paying list. And the moment a successor is rumored, the outgoing body gets discounted hard; if last year's model does everything you need, that pre-successor dip is often the single best deal of the year. The one thing not to do is buy a brand-new body in its first month, when it's at full price and the rebate season hasn't started.
When to pick an alternative
No camera wins for everyone, so let your dealbreakers decide. Choose a used previous-generation body if budget is tight; last year's flagship on the secondhand market routinely beats this year's entry model on image quality and build. Choose APS-C with two good lenses over full-frame with one kit zoom whenever weight, price, and actually carrying the thing matter. Step up to full-frame only when low light, shallow depth, or large prints are recurring needs, not aspirations. Pick a compact or your phone if the alternative is a serious camera that lives in a drawer because it's too bulky to bring. Match the system to how you actually shoot, commit to the lens ecosystem, then use the price history to time the body.