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- ACAM51BK vs SJ20
Nedis ACAM51BK vs SJCAM SJ20
What ACAM51BK does better (3) and where SJ20 wins (5) — every spec side by side.
Dimensions
Size comparison
ACAM51BKSJ20
| ACAM51BK | SJ20 | Difference | |
|---|---|---|---|
| Height | 41 mm | 55 mm | −14 mm |
| Width | 59 mm | 70.5 mm | −11.5 mm |
| Depth | 31 mm | 30 mm | +1 mm |
| Weight | 345 g | 370 g | −25 g |
Drawn to the same scale from the official dimensions (front and side).
Why is ACAM51BK better than SJ20?
- Battery life (recording)90 min vs 60 min+50%
- Weight345 g vs 370 g+7%
- Battery capacity900 mAh vs 800 mAh+12%
Why is SJ20 better than ACAM51BK?
- Photo resolution8 MP vs 20 MP2.5×
- Main screen size2″ vs 2.29″+15%
- Waterproof with housing30 m vs 40 m+33%
- Max field of view140° vs 154°+10%
- Depth31 mm vs 30 mm+3%
Specifications
Side by side
| Design & durability | ||
| Weight | 345 g | 370 g |
| Width | 59 mm | 70.5 mm |
| Height | 41 mm | 55 mm |
| Depth | 31 mm | 30 mm |
| Waterproof without case | 0 m | 0 m |
| Waterproof with housing | 30 m | 40 m |
| Video | ||
| Max video resolution | 4K | 4K |
| 4K frame rate (max) | 30 fps | 30 fps |
| Max frame rate (slow motion) | 120 fps | 120 fps |
| H.265 / HEVC | — | Yes |
| Timelapse / hyperlapse | Yes | Yes |
| Pre-recording (HindSight / Pre-Rec) | — | Yes |
| Sensor & photo | ||
| Photo resolution | 8 MP | 20 MP |
| Aperture | — | f/1.3 |
| Max field of view | 140° | 154° |
| Lenses | — | 2 |
| Stabilisation | ||
| Stabilisation system | — | 6-Achsen Stabilisation |
| Electronic image stabilisation | — | Yes |
| Screens | ||
| Front screen | Yes | Yes |
| Main screen size | 2″ | 2.29″ |
| Touchscreen | — | Yes |
| Audio | ||
| External microphone support | — | Yes |
| Battery | ||
| Battery capacity | 900 mAh | 800 mAh |
| Battery energy | — | 3 Wh |
| Battery life (recording) | 90 min | 60 min |
| Connectivity | ||
| Wi-Fi | Yes | Yes |
| Bluetooth | Yes | — |
| Webcam mode | Yes | Yes |
| Live streaming | — | Yes |
| Storage & features | ||
| microSD card slot | Yes | Yes |
