Sat Feb 03, 2018 6:47 pm
A camera is more than it sensor. Cooling, and the Video processor are going to determine light sensitivity.
Most sensors in small cameras are more light sensitive, and have greater DR, than how they are implemented in a given camera.
The Pocket camera sensor is a good example, this Aptina sensor can do higher frame rates, faster readout times, than how it is implemented in the Pocket camers, where it was tuned for DR, frame rate capped at 1080p30, and sensor readout time slowed down to keep,it from overheating in its small form factor Camera body. The same sensor in a Micro Cinema Camera with better cooling and a faster video processor, resulted in faster sensor readout times and increased frame rates up to 60p.
While the 4K sensor may be the same as in the Studio and Micro Studio Cameras, it’s video oricessor is going to be bigger, and more capable of adding additional processing to allow for faster sensor readout times, and increase the useable Lux sensitivity of the sensor, and wil, have better cooling to keep the video noise down, allowing for higher gain values to be used. Also the sensor could have different analog converters on the sensor, also increasing the useable gain, and setting a new base/Native ISO at something closer to 400 or 800.
So just because the sensors are the same size, doesn’t not necessarily mean they are the exact same sensor, but may be from the same sensor family, Aptina, but implemented differently.
Cheers
Denny Smith
SHA Productions