You can properly control a dSLR or mirrorless. You can determine exact aperture, field-of-view, exposure, etc. That's helpful if you're doing any sort of machin

You can properly control a dSLR or mirrorless. You can determine exact aperture, field-of-view, exposure, etc. That's helpful if you're doing any sort of machine vision. Webcams have more controls than normally exposed, but you still can't e.g. swap out a lens for a different focal length.