I recently purchased a Canon EOS 80D and am just awaiting the order of a Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM C Lens for Canon. I previously had a Canon EOS 1100D camera with Canon zoom lens EF-S 18-200mm. I just wanted some tips with regard to ideal ISO, shutter speed and aperture settings. For example when I am taking photographs outside on a sunny day and similarly on a cloudy/overcast day. Later in the year, I am going on a cruise holiday and was looking for some tips on ideal ISO, aperture and shutter settings inside the cruise ship where lighting may be low in certain areas than others. Should I stick to AWB setting in all above scenarios or consider changing it to tungsten or fluorescent lighting, for example in indoor settings on a cruise ship. With regard to ISO, I am aware that the higher the ISO, the more grain is likely to get into photos and I want to ensure that my shutter speed is suitable so that I avoid blur. I have been told that ISO shouldn't normally go over 800, but I don't know whether that is different on the Canon EOS 80D.