Ok guys and gals. I just got my D40 and I've been playing around a decent amount. I'm trying to learn things so I'm using the "P" mode to mess around and I just want to make sure I'm understanding things correctly. When I'm indoors with poor lighting the shutter is sloooooooow. This is because the image is trying to get more light, right? Also, as I increase the zoom (and consequently increase the f stops) the shutter time gets longer and longer b/c I'm increasing the f stops and increasing the time needed to get the adequate light to the sensor. So at 18mm the f/3.5 and at 55mm the f/5.6. I can also change the white balance on the camera, but that leads to under/over exposure if done to far. Is what I'm saying correct and I'm understanding it correctly? Also, if I want to take the majority of my pictures indoors, do I need to get a prime 50mm correct? Like the Nikon 50mm f/1.4g. Thanks for your help!