Quick Answer
Choose an FPV camera based on three factors: size (nano 14mm, micro 19mm, or standard 28mm to fit your frame), aspect ratio (4:3 or 16:9 to match your goggles), and flying style. Racing pilots need low latency, freestyle pilots want good image quality, and night flyers should look at starlight sensors with low-light capability.
FPV Camera Sizes Explained
FPV cameras come in four main sizes, each designed for different builds. Getting the wrong size means modifying your frame or buying a new camera.
| Size | Width | Best For |
|---|---|---|
| Nano | 14mm | Micro quads, tiny whoops, toothpicks |
| Micro | 19mm | 3-5 inch freestyle and racing drones |
| Mini | 21mm | Larger 5-inch builds with standard mounts |
| Standard | 26-28mm | Full-size frames and older designs |
Nano cameras like the Caddx Ant Lite weigh under 2g and fit micro frames, making them ideal for ultralight builds. Micro cameras such as the Foxeer Cat 3 offer better sensors and more features while still fitting most modern frames. Standard cameras are increasingly rare but still found on some larger builds.
Aspect Ratio: Matching Your Goggles
Your camera's aspect ratio must match your FPV goggles. A mismatch causes stretched or cropped video, which makes flying harder and can cause disorientation. Most FPV cameras offer either 4:3 or 16:9 aspect ratios, with some supporting both via a switch or menu setting.
4:3 is the traditional FPV format and still the most common. Most analogue goggles use 4:3 screens. 16:9 provides a wider field of view but only works properly with widescreen goggles. If you fly both analogue and digital systems, choose a camera that can switch between ratios.
The Caddx Ant offers switchable 4:3 and 16:9 modes, making it versatile if you change between different goggles or video systems.
Image Quality and Sensor Types
FPV cameras use CMOS sensors, which offer good image quality with low power consumption. Resolution is measured in TVL (TV Lines), with higher numbers providing sharper images. Most cameras range from 800 to 1500 TVL, though resolution alone doesn't determine picture quality.
More important than resolution is how the camera handles different lighting conditions. WDR (Wide Dynamic Range) helps the camera cope when flying from dark areas into bright sunlight, preventing the image from washing out. This matters if you fly near trees, through tunnels, or at dawn and dusk.
Low-Light and Night Flying
If you want to fly at night or in dim conditions, look for starlight or low-light cameras. These use sensitive sensors and larger apertures to capture more light. A starlight camera can see details in conditions where a standard camera shows only darkness.
The Foxeer Cat 3 is specifically designed for low-light performance, with sensitivity down to 0.00001 lux. This makes it suitable for evening flights and indoor locations with poor lighting.
Latency and Racing Performance
For racing, latency matters more than image quality. Lower latency means less delay between reality and what you see in your goggles, giving you faster reactions. Most modern cameras have latency under 30ms, but racing pilots often prioritise the fastest response over the prettiest picture.
Analogue cameras generally have lower latency than digital systems, making them popular for competitive racing where every millisecond counts.
Field of View (FOV)
The field of view determines how much of the scene you can see. Wider FOV gives better peripheral vision, helping you spot obstacles and gates. Narrower FOV makes distance judgement easier but reduces awareness of your surroundings.
Most cameras come with a standard lens around 1.8-2.1mm, but you can often swap lenses to change the view.
Mounting and Installation
Check that your frame supports your chosen camera size and mounting pattern. Most frames include adjustable camera mounts that allow you to set the tilt angle. More tilt gives higher forward speed but makes hovering and slow flight harder.
Browse our full range of FPV cameras to find options for any build. For more on video systems, read our guide on FPV frequencies and channels and our comparison of analogue versus digital FPV.
FAQ
Q: What camera size do I need for a 5-inch quad?
A: Most 5-inch frames take micro (19mm) cameras. Some accept nano cameras with adapter plates, while others work with mini (21mm) cameras. Check your frame specifications before ordering.
Q: Can I use a 4:3 camera with 16:9 goggles?
A: Yes, but the image will either have black bars at the sides or be stretched to fill the screen. For the best experience, match your camera aspect ratio to your goggles.
Q: Do I need a special camera for night flying?
A: Standard cameras struggle in low light. If you want to fly at night or indoors with poor lighting, get a starlight or low-light camera with high sensitivity ratings.
Q: What is WDR and do I need it?
A: WDR (Wide Dynamic Range) helps cameras handle scenes with both bright and dark areas. It's useful if you fly in varied lighting conditions but adds cost. Most mid-range cameras include it as standard.