Absolutely stunning photos - thanks so much for sharing. I've been to the north of Norway before - but only a short trip, and we saw an awful lot of cloud. Going back is definitely on my list.
By the way, I'm not sure if you noticed, but there are two train services from OSL to the city centre - it's the equivalent of the Heathrow Express and Heathrow Connect. The flytoget service takes about 20 minutes and costs 170NOK, or you can take the NSB service in half an hour for 90NOK.