Selfie cameras are sold on the wrong numbers. Megapixels, zoom multipliers and the number of shooting modes on the box have almost no effect on whether your footage looks good. Seven specifications do. Here is what each one changes on screen, and what to ignore.

1. Stabilisation: gimbal or electronic — decide this first

This single choice affects every other frame you shoot, so settle it before anything else. Electronic stabilisation (EIS) crops into the sensor and shifts the image to cancel movement. It is cheap, it works in a phone, and it degrades in low light because there is less image to work with. A mechanical gimbal moves the lens instead, keeping the full field of view and full resolution, and it holds up when the light drops.

The practical test is not which is “better” but where the camera will be used. For static talking-head selfies, EIS is enough. For walking, cycling, skateboarding or anything handheld at arm’s length, a gimbal is the difference between usable and unusable.

Figure 1: Resolution is the easiest spec to advertise and the least likely to change whether a clip is watchable.

2. Sensor and effective resolution

4K is worth having, but a real 4K sensor matters far more than an interpolated one. Look for native capture rather than “up to 4K” in the footnote. Equally important: what resolution survives when stabilisation is switched on. A camera that advertises 4K but drops to 1080p the moment you enable stabilisation has told you which mode it was designed around.

3. Field of view — count the people, not the degrees

Marketing quotes 150° or 170° fields of view, which produce a fisheye look and make faces bulge at the edges. For selfies you want a moderate angle plus digital zoom you can use to crop in without walking closer. The most useful specification is the one nobody prints: at your normal arm’s length, does your head and shoulders fill the frame naturally, or is the horizon curved?

4. Frame rate, and the light it demands

Higher frame rates do not create light. 4K at 60fps indoors halves the exposure per frame, so the camera raises ISO and the footage goes grainy. If your shooting happens outdoors, 4K/60 is a genuine advantage for slow-motion. If it happens indoors, the ability to step down to 1080p/30 cleanly matters more than a 60fps badge.

5. The screen — and whether it flips

A rear screen you can see while you are in shot is the difference between framing and guessing. Two designs solve this: a screen that flips 180° toward you, or a gimbal head that rotates the whole camera around. On the AT-M105 the second approach is used — a 1.72″ touchscreen on a head that swings to face you, so you see headroom, eye line and background clutter live instead of checking afterwards.

6. Battery: talk about minutes, not milliamp-hours

A 2400mAh cell sounds impressive until you learn it feeds a gimbal motor and a screen as well as the sensor. Ask for continuous recording time at the resolution you intend to use. Roughly three hours of shooting per charge, with the ability to record while charging, is what lets you leave the spare battery at home — and a camera that dies halfway through a shoot is worse than one with a lower resolution.

Figure 2: Continuous recording time is the honest battery number — a gimbal head spends power on stabilisation, not just on the sensor.

7. Mounting, transfer and the app

Check three unglamorous things before you buy. Does the body take a standard tripod thread, so it works on the mount you already own? Does it export over Wi-Fi in one or two taps, or does it demand a card reader? And does the app stay connected while you shoot, or drop the link when the camera starts recording? These details decide whether the camera gets used after the first week.

Specs that look good on paper and change nothing

•   Megapixels beyond 12–16. Video resolution is what matters; extra pixels mostly raise file sizes.

•   Digital zoom multipliers. They crop the sensor. Useful, but not a reason to choose one camera over another.

•   Mode counts. Twenty scene modes you will never leave are a packaging exercise.

•   Peak frame rates at reduced resolution. If 120fps only exists at 720p, it is not the headline figure the box implies.

Bottom line

Buy the stabilisation system that matches how you move, a sensor that shoots true 4K, a screen you can see while in frame, and enough battery to finish the shoot. Everything else is a rounding error. If you want to see how those four answers come together in one pocket-sized device, start with the AT-M105 4K pocket vlog gimbal camera, and if your priority is in-body stabilisation instead of a gimbal, the AT-M90TR 5K action camera with 6-axis EIS is the other side of the same decision.