Key takeaways
- Mirrorless is the modern standard for interchangeable-lens cameras.
- Compacts trade flexibility for pocketability; premium compacts have large sensors.
- Sensor size shapes low-light quality, depth of field and the size of the whole system.
- Crop factor tells you how a lens will frame compared with full frame.
Mirrorless cameras
A mirrorless interchangeable-lens camera (often shortened to MILC) sends light straight from the lens to the image sensor. You compose through an electronic viewfinder (EVF) or the rear screen, which shows a live preview of the exposure, white balance and depth of field before you press the shutter.
Strengths
- What you see is what you get
- Advanced subject-detection autofocus
- Smaller bodies, silent electronic shutter
- Excellent video features
- All new lens development happens here
Weaknesses
- Shorter battery life than DSLRs
- EVF lag on the cheapest models
- Full-frame lenses are still large
Best for: almost everyone — beginners, enthusiasts and professionals alike.
DSLR cameras
A digital single-lens reflex camera uses a mirror and prism to show you the scene optically through the lens. When you take the picture, the mirror flips up and light reaches the sensor. DSLRs dominated for two decades, and Canon, Nikon and Pentax built huge lens catalogues for them.
Strengths
- Lag-free optical viewfinder
- Very long battery life
- Huge, inexpensive used lens market
Weaknesses
- Canon and Nikon have shifted new development to mirrorless
- Bigger and heavier
- Live-view and video autofocus weaker than mirrorless
Best for: tight budgets buying used, and photographers who love an optical viewfinder. Pentax continues to champion DSLRs.
Compact cameras
Compacts have a fixed, non-interchangeable lens. They split into two very different groups:
- Premium compacts with 1-inch, APS-C or even full-frame sensors and a sharp prime or short zoom lens. Examples include the Fujifilm X100 series, Ricoh GR series, Sony RX100 series and Leica Q series. Superb for street and travel photography.
- Basic point-and-shoots with small sensors. Largely replaced by smartphones, though some remain popular for their nostalgic look.
Best for: travellers and street photographers who want quality in a jacket pocket and won't miss changing lenses.
Bridge & superzoom cameras
Bridge cameras look like small DSLRs but have a fixed zoom lens — often reaching 600mm-equivalent or more. They "bridge" point-and-shoots and interchangeable-lens cameras. The catch is a small sensor (usually 1/2.3-inch or 1-inch), which limits low-light quality and background blur.
Best for: birding, safari and zoo photography on a budget; anyone who wants maximum zoom in one package.
Action & 360° cameras
Tiny, rugged and often waterproof, action cameras mount on helmets, bikes and boards. They shoot ultra-wide video with powerful electronic stabilisation. 360° cameras record everything around them, letting you choose the framing later.
Best for: sport, adventure, underwater and POV video. Not a replacement for a general stills camera.
Medium format cameras
Medium format digital sensors are larger than full frame — typically about 44 × 33 mm, and larger still in top-end backs. Systems like Fujifilm GFX and Hasselblad X deliver outstanding detail, smooth tonal gradation and wide dynamic range.
Best for: landscape, studio, product and fine-art photographers who print large and work at a slower pace.
Film cameras
Analogue photography has had a strong revival. 35mm SLRs, rangefinders and medium format film cameras are widely available used, and several new film cameras and emulsions have launched in recent years. The slower, deliberate workflow teaches you to think before each frame.
Best for: hobbyists who enjoy the process and the look. Budget for film, development and scanning on every roll.
Smartphones
Phones use tiny sensors but compensate with powerful computational photography — merging multiple frames to reduce noise and extend dynamic range. They're unbeatable for convenience; dedicated cameras still win on optical zoom, fast action, natural background blur and editing flexibility.
Sensor sizes compared
A bigger sensor collects more total light, which generally means cleaner images in low light, more dynamic range and shallower depth of field at the same framing and aperture.
| Format | Approx. size | Crop factor | Typical cameras |
|---|---|---|---|
| Medium format (digital) | 44 × 33 mm | 0.79× | Fujifilm GFX, Hasselblad X |
| Full frame | 36 × 24 mm | 1.0× | Canon EOS R, Nikon Z, Sony a7/a1/a9, Panasonic S, Leica |
| APS-C | 23.5 × 15.6 mm | 1.5× | Sony a6000 series, Fujifilm X, Nikon Z DX |
| APS-C (Canon) | 22.3 × 14.9 mm | 1.6× | Canon EOS R50, R10, R7 |
| Micro Four Thirds | 17.3 × 13 mm | 2.0× | OM System, Panasonic Lumix G |
| 1-inch type | 13.2 × 8.8 mm | 2.7× | Premium compacts, some bridge cameras |
| 1/2.3-inch type | 6.2 × 4.6 mm | ~5.6× | Superzooms, action cameras |
Fractional-inch sensor names come from old video camera tubes. A "1-inch" sensor is actually about 13.2 × 8.8 mm — the name describes the tube's outer diameter, not the sensor's size.
Crop factor, in plain English
Focal length is a property of the lens, so a 50mm lens is always 50mm. But a smaller sensor records only the centre of the image the lens projects, so the photo looks "zoomed in". The crop factor lets you compare:
- 50mm on APS-C (1.5×) frames like 75mm on full frame.
- 50mm on Canon APS-C (1.6×) frames like 80mm.
- 25mm on Micro Four Thirds (2×) frames like 50mm.
This is why wildlife photographers like smaller sensors (extra "reach") and landscape photographers need very short focal lengths on them to get wide views. Learn more in our guide to focal lengths.
Which type should you choose?
| If you want… | Choose |
|---|---|
| One camera that can grow with you | APS-C or full-frame mirrorless |
| The smallest system with interchangeable lenses | Micro Four Thirds or compact APS-C |
| Pocketable high quality | Premium compact |
| Huge zoom on a budget | Bridge / superzoom |
| Adventure and POV video | Action camera |
| Maximum image quality for prints | Medium format or high-resolution full frame |
Frequently asked questions
What is the difference between mirrorless and DSLR cameras?
A DSLR uses a mirror to bounce light into an optical viewfinder. A mirrorless camera has no mirror: the sensor feeds an electronic viewfinder or screen directly. Mirrorless cameras are smaller, show the exact exposure before you shoot, and have more advanced autofocus.
What is crop factor?
Crop factor compares a sensor's size to full frame (36 × 24 mm). Multiply a lens's focal length by the crop factor to get the full-frame equivalent field of view. For example, a 50mm lens on APS-C (1.5×) frames like a 75mm lens on full frame.
Is medium format worth it for a beginner?
Rarely. Medium format offers exceptional detail and tonality, but bodies and lenses are expensive, larger and slower to operate. It suits landscape, studio and fine-art photographers who print large.
Are film cameras still worth buying?
Film is popular again for its look and slower, deliberate process. It's rewarding as a hobby, but film and development costs add up quickly, so most people shoot film alongside a digital camera rather than instead of one.
