on open files_
	display dialog "Please enter the Camera Manufacturer:" default answer ""
	set Manufacturer to text returned of result
	display dialog "Please enter the Camera Model:" default answer ""
	set Model to text returned of result

	repeat with file_ in files_
		tell application "Finder"
			set file_ to POSIX path of file_
			do shell script "exiftool '-Make=" & Manufacturer & "' '-Model=" & Model & "' -overwrite_original " & quoted form of file_
		end tell
	end repeat
end open