AmScope 20MP USB3.0 BSI C-mount Microscope Camera. Is a back-illuminated CMOS camera. Back-illuminated CMOS sensors provide less image-noise and dark-current while maintaining high speeds. This camera has a 1-inch sensor, it is best-suited for microscopes with a direct C-mount interface.
Smaller photo-ports, such as 23mm ports, will typically cause vignetting.