I have trouble finding decent documentation on the HDR 'ISO Shifting' functionality of Magic Lantern. Is there anyone that can give me a short summary of pros and cons of the settings 'none' (regular AEb), 'half' (AEb + iso) and 'full' (iso)? I am mostly interested in the scenario where I am shooting HDR inside dimly lit buildings, on a Canon 650D with 18-200mm f/3.5-5.6 lens.