Hello Everyone... I am just beginning to dive into the world of photography and trying to avoid complete automatic modes on my camera. After all I spent the money on a DSLR and not a point and shoot camera. I currently have the following gear: Canon Rebel T5i 18-55mm STM Kit lens 55-250mm STM lens 50mm STM prime lens Can someone explain to me when I would use the different modes on my camera? From what I gather... If you are shooting something in a situation where lighting will not change (indoors, studio, etc...) you would use full manual mode to ensure that your settings don't change from image to image. Aperture priority mode is for when you would like to use depth of field for portrait or landscape photos, and shutter priority is for when you are taking action shots. Program mode just looks like automatic mode but you can override it. Am I correct with all of that? Would and/or should I use manual mode if I am just walking around snapping pictures? How do I perfect using Manual mode? When in manual mode do you rely on the light meter to make sure your shot is not under or over exposed? Is there a good basis on what settings you would use for a portrait or landscape shot? I understand that for a portrait I would use a lower f-stop and a landscape I would use a higher f-stop. However, how do I know how far to go for either one? Also, how do I figure out what my shutter speed and ISO should be with the corresponding settings? Thanks in advance, I know I have a lot of questions. I would like to fully understand photography and have been reading and watching videos to absorb as much info as I can.