Larger camera sensor gather more light.
What is a broadcast quality camera?
The term broadcast quality refers to the quality achieved by professional video cameras and time base correctors used for broadcast television.
What is the advantage of larger camera lenses?
A larger diameter allows the lens to be larger.
Why are some camera lenses so big?
They are big because of the laws of physics.
Why are DSLR so big?
Early on for DSLRs the memory, inage sensor, imageCPU and other electronics were all purchased from multiple vendors and as a result the cameras got larger. If a company puts in the effort to design custom chips to combine memory, imageCPU and display the size can be reduced.