Further note: you can get any number of attributes of an immage in one call to ImageMagickObject identify method, e.g.
local img = com.create_object("ImageMagickObject.MagickImage.1")
local msgs = img.identify("-format", "%k %l %m %x %y %z
%[EXIF:FocalLength] %[EXIF:DateTime]", <path_to_file>)
Of course you can do exactly the same using ImageMagick identify.exe
