Dark corners and unexpected events of fish-eye lens

[Luke]

Hi，

In my implementation, I need to use a wide-angle lens.

After changing to a fish-eye lens， I got large dark corners and lots of 'events' at the corner in rendered frame.（please see attached photo）

Where should I adjust it?  

The 'cornered events' are out of the image, and the density is much higher than the centre area of the image, where do these events come from?

best,

Luke

[Tobi Delbruck (INI)]

You need to use a lens for a larger sensor, e.g. 1/2" lens. The corners
are cut off and black, and so generate lots of noise events.  You can
reduce the noise by decreasing bandwidth or increasing threshold, but it
will not fix this vignetting problem. I believe the lens specs are
available on inivation site, but you can also compute the array size
from the 18.5um pixel size.