Plane-spotting gear: what actually earns a place in your bag

Start with your eyes, then your ears, then your camera

The gear that earns space in a spotting bag does one of three things: it helps you find and identify aircraft, it helps you record what you saw, or it keeps you comfortable enough to stay out all day. Everything else is weight. Here is what actually pulls its weight, roughly in the order most spotters add it.

Binoculars: your most-used tool

A good pair of binoculars gets used more than any camera, because most of the time you are watching, not shooting. The two numbers on every pair tell you almost everything. The first is magnification, the second is the diameter of the front lens in millimeters.

8x vs 10x. Higher magnification brings distant aircraft closer, but it also narrows your field of view and magnifies every tremble of your hands. For handheld use, especially tracking a moving aircraft on approach, 8x is easier to hold steady and easier to pick up a fast jet in. Choose 10x if you spend most of your time at long, fixed range and can brace against a fence or car.
Field of view. A wider field makes it much easier to catch a moving aircraft and follow it. If you have to choose, prioritize this over raw power.
Weight and comfort. A pair that hangs off your neck for six hours needs to be light and comfortable. Larger front lenses gather more light for dusk sessions but add bulk. A mid-size objective is a sensible all-day compromise.

Look for solid grip, a smooth focus wheel, and if you spot near water or in changeable weather, weather sealing.

A camera with reach

For recording registrations and liveries, or just for the photos, the priority is reach and autofocus, not megapixels.

Focal length. Aircraft are far away, so you want a telephoto lens that lets you fill the frame. More reach helps at large fields where the runway sits well beyond the fence.
Autofocus. A system that locks quickly and tracks a moving subject matters far more than resolution. Continuous or tracking autofocus keeps a moving aircraft sharp as it crosses in front of you.
Handling. You will pan and re-frame constantly, so a body and lens you can hold and swing comfortably beats one that is technically better but tiring.

Radio and airband scanners

An airband scanner lets you listen to air traffic control and pilots, which adds context and early warning of what is inbound. Two important cautions:

Legality varies by country. In some places listening to airband is fine, in others merely receiving certain transmissions, or acting on what you hear, is restricted or outright illegal. Check the rules where you live and where you plan to spot before you buy or switch anything on. Do not assume what is allowed elsewhere applies to you.
It is a learning curve. Frequencies, phraseology, and etiquette take time. Treat it as an upgrade once you know you are committed, not a day-one purchase.

Flight-tracking apps

Phone apps that show live aircraft positions, routes, and aircraft types are the cheapest and most useful single addition to your kit. In general terms they help you know what is coming, identify what just passed, and plan your day around interesting arrivals. Signal and coverage vary by location, so treat them as a guide rather than gospel.

Small essentials that make the day

The unglamorous items are the ones you regret leaving behind.

A logging method: a small notebook or a phone app to record registrations, times, and types.
Sun protection: hat, sunglasses, sunscreen. Open airfields have no shade.
Ear protection if you will be near active engines.
Water and a snack.
Comfortable, closed footwear for standing and walking on rough ground.
A compact bag that carries the above without becoming a burden.

Start here on a budget, upgrade later

Budget start: one decent 8x binocular, a free flight-tracking app, a notebook, and sun and ear protection. This alone makes for full, satisfying days.
Upgrade later: add a camera with a telephoto lens once you know you want photos, and consider a scanner only after checking your local law and confirming you will use it. Buy the next item when your current kit is genuinely limiting you, not before.