for /r %%imagefile2 in (%cd%/camera-2-*.jpg) do (
  set imagefile1=%%imagefile2:camera-2=camera-1%

  echo "Primary image file:"
  echo %imagefile1

  IF EXIST %cd%/%imagefile1 (
	echo "Good pair."
  ) ELSE (
   	ECHO "Bad pair. Primary image file doesn't exist. Deleting second image file as well..."
  )
)