light_pilgrim wrote in post #15982035
So the L bracket.....why would people need one for Landscape? Just trying to undersyand

It is useful for panoramas (at least when you don't have a pano head, which I don't). The camera in vertical position means you have more room for error for any vertical drift (so you take a single row, with more shots rather than 2 or 3 rows with fewer shots per row which I'll try explain using this pathetic diagram where each line represents a photo: ||||||| vs =====). As you can see, more room for vertical cropping/error in the first example.
I also like the centre of the image to stay in the same position when I rotate the camera to portrait rather than have to reframe the whole shot.
And I do take portrait orientation landscapes fairly often, so... 
light_pilgrim wrote in post #15982096
And why you need bracket? You need legs and a head...that is it, correct?
By bracket he means the quick release plate. You aren't going to get very much use out of your tripod head if you don't have a plate to fit into the clamp. An L bracket is a quick release plate that goes up the left side of your camera, forming an L shape in case you were confused about that too. 