Hello, Before I purchased my G5, I did lot's of long exposures with my old G1. As expected there were a little bit of noise, but perfectly acceptable. Because the G5 deal better with high ISO settings, I thought that on long exposures under low light (before sunrise, for example) I would be presented with more clean photos. Last weekend I get up earlier and went to a spot to take a few photos of a bridge with the sun rising from behind. I toke several long exposure photos before the sunrise using ISO 160 and a ND400 filter to smooth the water and found that the resulting photos that I did with 60 seconds or more than 20 seconds have a strange random coloured noise. It is a different noise from the one we used to see on high ISO settings. The photos I toke with exposures of 8 or 13 seconds look nice and without any trace of that uggly noise. I never had this problem with my G1. I'm a bit shooked and disappointed, because I was expecting to get better results than the ones from my old G1. Is anyone having this same problem? Could be caused by any camera setting? I was using Oly 12-50mm @ 14mm, iDynamic Standard setting, iResolution Standard setting, ISO 160, aperture priority, f/5.6 to f7.1, mechanical shutter with remote shutter.