1. Bokeh is the orbs that are created when lights are not in focus inside a image
2.File format:The file format is how your camera lens will record the image or image file.
3.Focal length:The focal length describes the distance in millimeters between the lens and the image it forms on to film it.
4.Focus: when your eyes focus on an object thats close to you,the objects far away will appear blurry.
5.Hot shoe:Hot shoe is the slot at the top of a camera for adding accessories,live the aptly named hot shoe.