One thing to keep in mind... in low light situations, your sensor still needs a certain amount of light to register an image, otherwise it comes out either very dark or black. The darker the subject, the longer the exposure must be, and the longer the exposure, the more apparent any motion either from the camera operator (yes, even your heartbeat can affect it) or from subject movement will become. For example: If I have my tank lights on and I can take a picture at 1/60th of a second (there are a lot more things to factor in, I'm just keeping this simple) then with the night lights on, it will likely be more like 1/2 or 1/4th of a second. Now... at 1/60th of a second, the exposure is capturing such a tiny segment of time that things appear to be sitting still, even if there was a little motion in the picture. At 1/2 or 1/4th of a second however, the image may appear VERY distorted, as no human can hold still enough to produce a completely stable image at 1/2 a second. (We can do a decent job, but if you're actually holding the camera, there will be motion blurs) Now... one thing that will help with minimizing operator motion is the use of a tripod, desk, or otherwise stationary surface. To enhance this option further, set the camera on time-delay mode, as if you were taking a self portrait. Once you press the shutter button, it will count down for 10 (roughly) seconds until it actually takes a picture. Leave the camera be for this countdown... this will make sure there is zero motion in the camera. If you bump or adjust it while its counting down, it may compromise the stability you are trying to create. Keep in mind, this will reduce or eliminate operator based motion blurs, but if your subjects are darting around, they will still be blurred in the final image. The only real ways to get "still subjects" in low light situations are either a flash (which to show off moonlights is not preferable, as the main light source is no longer the moonlights) or a larger aperture, which has its own setbacks. Hope that helped you a little bud. Feel free to PM me if you have more questions.
