Hello guys! I have a Canon 40D and I'm using a Canon EF-S 18-55mm f/3.5-5.6 III lens. I am just playing around and learning to use it at the moment. I want to learn how to change the aperture and shutter speed. I understand to do this I move the mode dial on the top left to Av to change aperture, M to change both and Tv to change the shutter speed. I understand that once selected, I move the ridged dial on the top right hand screen and look through the view finder. Only I am confused at what is what! So when I look through the view finder I see (When using M): Number(as I move camera this moved) Number A little scale -2 - +2 and then ISO 100 75 EDIT: I watched this video! View: https://www.youtube.com/watch?v=JKhhJxtx_20 Could someone explain what each bit is Also someone I take a photo and it's just black, and it takes ages to take the photo, like 10 seconds. I changed to no review time, how do I make it take a photo immediately?