RAW or JPEG
Every frame needs decisions about white balance, contrast, sharpening and noise reduction. Shoot JPEG and the camera makes those calls on the spot and writes them into the pixels. Shoot RAW and the sensor data is kept as is, with the calls left for your computer. Pick by how many of them you want to make yourself.
1. What each one actually is
Sensor data isn't a picture yet. It's a single-channel record of light that needs demosaicing, white balance, colour mapping, sharpening, noise reduction and gamma encoding before you can look at it.
- With JPEG, the camera runs that pipeline itself, applies your picture style and compresses the result. Convenient, but those decisions are baked into the pixels.
- With RAW, the camera saves the sensor data plus what it would have done, and leaves the processing to you. It's closer to a negative than a photo.
2. Four places they differ
| RAW | JPEG | |
|---|---|---|
| Bit depth | 12–14 bit, 4,096–16,384 levels per channel | 8 bit, 256 levels |
| White balance | Freely reset later, no loss | Fixed; only roughly correctable |
| Lifting shadows | Usually 2–3 stops before it falls apart | Noise and banding by 1 stop |
| File size | Roughly 4–8× the same frame as JPEG | Small |
Bit depth drives the rest. Lift shadows hard and 8-bit's 256 levels pull apart into visible steps: banding. 14-bit has over 16,000 levels to spare.
Zlens turns the phone into the camera console: live view, remote settings, RAW transfer. Android first, coming soon.
About Zlens and supported cameras3. Choosing by subject
| Situation | Use | Why |
|---|---|---|
| Landscape, sunrise/sunset | RAW | Huge dynamic range; both ends need recovering |
| Indoors / mixed lighting | RAW | White balance goes wrong most here, and RAW resets it losslessly |
| Weddings and events | RAW + JPEG | JPEGs deliver same-day; RAW waits for the few frames worth retouching |
| Travel snapshots | JPEG | Lots of frames, little appetite for editing; the space and time saved matter more |
| Sport and wildlife bursts | JPEG or compressed RAW | RAW writes slowly; a full buffer stops the burst |
4. Common myths
- "RAW is sharper." No. Same resolution; RAW gives you room to adjust, not more detail. Plenty of bodies make JPEGs that beat a beginner's RAW edit.
- "RAW is a standard format." No. Each maker, sometimes each body, has its own (.ARW, .NEF, .CR3, .RAF), and new cameras often go months before common editors can open them.
- "Shoot RAW and exposure doesn't matter." Dangerous. Highlights blown to pure white are gone for good. RAW rescues shadows, not blown highlights.
Either way the settings are in EXIF, so you can turn them into a watermark later. JPEGs exported from RAW normally keep full EXIF too.
5. FAQ
Is RAW always better than JPEG?
No. RAW buys you room to edit, at the cost of processing every frame and files several times larger. If you won't edit, the camera's own JPEG usually looks better than a beginner's conversion.
Why are RAW files so large?
They hold 12–14-bit sensor data with little or no lossy compression. JPEG is 8-bit and lossy. A 4–8× difference for the same frame is normal.
Can I convert a JPEG back to RAW?
No. Making the JPEG already cut bit depth to 8, locked in white balance and colour, and threw away whatever the compression removed. Renaming or "converting" the file just puts the same reduced data in a new container.
Can phones shoot RAW?
Most mid-range and better phones can, but there are two kinds. Formats like Apple ProRAW keep the phone's multi-frame processing; the single-frame RAW in a pro or manual mode doesn't, and in night scenes it can look worse than the phone's own JPEG.