Slow motion disappointment!
As you can see trhe slow motion spec has remained constant in all of the OnePlus smartphone releases. The spec has been unchanged from 120fps at 720p HD since they first went to market. As to why that is, it is not clear but it is safe to assume that slow motion frame rates are not a priority for the team as a spec.
A phone of this caliber should be able to deliver 120fps in Full HD 1080p and or 240fps 720p HD video without breaking a sweat. Lesser speced phones offer this and more since two years back which have much smaller and slower memory footprint. Considering the 6GB are LPDDR4 which is plenty fast, the phone either has a software limitation or a sensor one.
A phone of this caliber should be able to deliver 120fps in Full HD 1080p and or 240fps 720p HD video without breaking a sweat. Lesser speced phones offer this and more since two years back which have much smaller and slower memory footprint. Considering the 6GB are LPDDR4 which is plenty fast, the phone either has a software limitation or a sensor one.
Rear Camera Specs:
Sensor: Sony IMX 298 Sensor
16 MP: 1.12 µm
16 MP: 1.12 µm
OIS: Yes
EIS: Yes
Autofocus: PDAF
Aperture: f/2.0
Video: 4K resolution video at 30fps
Slow Motion: 720p video at 120fps
RAW Image support: Yes
Front Camera: 8MP 1080p 30fps