I have a question about
 prices
 payment options
 sensors (imaging sensors)
 delivery time
 references Daheng Imaging?
 product life cycle management
 warranty
 manuals (documentation)
 applications
 resolutions (image sensors)
 I/O (input / output)
 return policy
 interface (USB vs GigE)
 lens selection
 VAT (tax free)
 loan sample
 shipping costs
 contacting
 shutters (rolling and global shutter)
 embedded (ARM board, Raspberry Pi)
 installation problems