A snapshot from my son and his wifes 10'th anniversary party on Saturday. For indoor shots I set the E3 to Auto ISO with the range being 100 to 2000. This is one of the few shots that I took - my 7 year old grandson was the official photographer using my E3 (with grip) and 12-60mm lens to document the people who were there. It is really something to watch him handle my cameras like an old pro pushing all of the buttons and scrolling around the images on the screen.
This shot in my daughter and her husbands living room is of my grandson Mason and his uncle Jordan. Exposure is f4 @ 1/100 'th sec :
2000 ISO. 12-60mm lens was set to 52mm (equiv 104mm):
This is one of Mason's pictures of his sister laying on the carpet. Again shot at
2000 ISO - exposure f3.9 @ 1/40 'th sec - - - 12-60mm lens set to 45mm:

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I also have purchased the 70-300mm (140-600mm f4/5.6) recently so plan on trying that out on my E bodies.