Mick, just saw this - I'm not sure if this will work or not as I don't have a 200D and haven't tried it on my 80D, but... maybe it's possible to set one of the scene modes along with auto-iso??? Or, manually set your f-stop and shutter speed and incorporate auto-iso with a fairly wide range to work with the changing light??? I'm *assuming* the 200D will change the ISO setting as the light level changes.
