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HERO9 Black has a new feature called in-camera Horizon Leveling. Available in Video and TimeWarp modes, Horizon Leveling uses a Digital Lens called Linear + Horizon Leveling to achieve a level horizon up to approximately 45 degrees.
2. You will see a slider to the right where you can select Linear + Horizon Leveling
3. To achieve maximum Horizon Leveling performance, be sure to enable Boost Hypersmooth

The charts below detail the angle limits when Linear + Horizon Leveling is enabled.
** All limits listed below are approximate
To enable Horizon Leveling
1. Go into your video Preset and select Lens2. You will see a slider to the right where you can select Linear + Horizon Leveling
3. To achieve maximum Horizon Leveling performance, be sure to enable Boost Hypersmooth
The charts below detail the angle limits when Linear + Horizon Leveling is enabled.
** All limits listed below are approximate
4:3 Aspect Ratios
Resolution | Frame Rate | Lens angle limit with Linear + Horizon Levling with HyperSmooth ON | Lens angle limit with Linear + Horizon Levling with HyperSmooth Boost |
4k 4:3 | 30/25 | 32° | 45° |
4k 4:3 | 24 | 32° | 45° |
2.7k 4:3 | 60/50 | 32° | 45° |
1440p | 120/100 | 32° | 45° |
1440p | 60/50 | 32° | 45° |
1440p | 30/25 | 32° | 45° |
1440p | 24 | 32° | 45° |
16:9 Aspect Ratios
Resolution | Frame Rate | Lens angle limit with Linear + Horizon Levling with HyperSmooth High/ON | FOV in this configuration | Lens angle limit with Linear + Horizon Levling with HyperSmooth Boost | FOV in this configuration |
5k | 30/25 | 28° | 75° | 33° | 68° |
5k | 24 | 28° | 75° | 33° | 68° |
4k | 60/50 | 28° | 75° | 33° | 68° |
4k | 30/25 | 40° | 87° | 45° | 75° |
4k | 24 | 40° | 87° | 45° | 75° |
2.7k | 120/100 | 28° | 75° | 33° | 68° |
2.7k | 60/50 | 40° | 87° | 45° | 75° |
1080p | 240/200 | 28° | 75° | 33° | 68° |
1080p | 120/100 | 28° | 75° | 33° | 68° |
1080p | 60/50 | 40° | 87° | 45° | 75° |
1080p | 30/25 | 40° | 87° | 45° | 75° |
1080p | 24 | 40° | 87° | 45° | 75° |
TimeWarp
Resolution | Frame Rate | FOV | Angle Limit |
4k 4:3 | 30/25 | 87° | 32° |
1440p | 60/50 | 87° | 32° |
4k | 30/25 | 87° | 40° |
1080p | 60/50 | 87° | 40° |