A physical shutter can only go so fast, meaning it is limited in the FPS it can achieve at a given cost. It also imposes limits on the flash sync speed and has a limited life time. And it makes a noise when actuated.I have a question as I am a semi-professional :
Why everyone is talking about "global shutter", what is the big deal about that ?
Thanks a lot.
An electronic rolling shutter doesn't have a life time and can allow much faster FPS. But the actual amount of time over which the image is created is greater than with a physical shutter, and different parts of the image are created at different times, causing objects in quick motion to become distorted. It is also silent.
A global shutter combines the best of both worlds. It is a Form of electronic shutter that effectively causes all areas of an image to be recorded at the same point in time. No wear, 0 distortion, super high FPS, silent, great flash sync flexibility.
Here is a great YouTube video that shows very well how a physical shutter operates, and also has a comparison of the distortion between a rolling electronic and global electronic shutter near the end: