A little tip for myself: always save pictures in a RAW format. Then, all the technical information is recorded with the image. For instance, I can confidently tell you that this was taken at an ISO of 100, an f/8 f-stop (if that’s your thing) and with an exposure time of a near-whopping 13 seconds. Ordinarily I wouldn’t deal much in all that technical camera-wanker business (and they know who they are), but for the sake of recording a process this is highly useful. Good for me.