Pat - You will generally want to turn off the long exposure noise reduction, since that will delay the interval time that you can take photos. I believe the noise reduction takes the same length of time as the original shot, so it will affect your time-lapse shots the most. In addition, when the aurora starts to take off you will want to take photos as fast as possible, and having to wait for the noise reduction to do its thing would be frustrating. I believe the High ISO speed NR impacts JPEG files only (please correct me if I'm wrong here). I just leave it on the default setting but I shoot in Raw only, and do my own noise reduction with Lightroom.





Reply With Quote